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All questions of June Week 1 for NEET Exam
Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties?- a)Only physical properties
- b)Only chemical properties
- c)In both physical and chemical properties
- d)thermodynamic properties
Correct answer is option 'C'. Can you explain this answer?
Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties?
a)
Only physical properties
b)
Only chemical properties
c)
In both physical and chemical properties
d)
thermodynamic properties
|
Anoushka Yadav answered |
Lothar Meyer proposed the periodic table in 1864. He arranged the elements in order of increasing atomic weights. He noticed that similarities appeared in both physical and chemical properties of the elements. The correct answer is option 'C' which means similarities appear in both physical and chemical properties.
Explanation:
The periodic table arranges the elements in a way that helps in understanding their properties. The modern periodic table is based on the electronic configuration of the elements. But the original periodic table was based on the atomic weight of the elements. Lothar Meyer was the first to realize that there is a periodicity in the properties of the elements when they are arranged in order of increasing atomic weights.
Physical properties are those that can be observed or measured without changing the chemical composition of the substance. Some examples of physical properties are:
- Melting point
- Boiling point
- Density
- Electrical conductivity
- Thermal conductivity
- Atomic radius
- Ionic radius
- Electronegativity
Chemical properties are those that can be observed during a chemical reaction. Some examples of chemical properties are:
- Reactivity with acids
- Reactivity with oxygen
- Reactivity with water
- Reduction potential
- Oxidation potential
Meyer observed that when the elements are arranged in order of increasing atomic weights, there is a periodicity in their physical and chemical properties. This means that elements with similar atomic weights have similar physical and chemical properties. For example, lithium, sodium, and potassium have similar physical and chemical properties because they all belong to the same group and have similar atomic weights.
Conclusion:
Lothar Meyer proposed the periodic table in 1864. He arranged the elements in order of increasing atomic weights. He noticed that similarities appeared in both physical and chemical properties of the elements. When the elements are arranged in order of increasing atomic weights, there is a periodicity in their physical and chemical properties.
Explanation:
The periodic table arranges the elements in a way that helps in understanding their properties. The modern periodic table is based on the electronic configuration of the elements. But the original periodic table was based on the atomic weight of the elements. Lothar Meyer was the first to realize that there is a periodicity in the properties of the elements when they are arranged in order of increasing atomic weights.
Physical properties are those that can be observed or measured without changing the chemical composition of the substance. Some examples of physical properties are:
- Melting point
- Boiling point
- Density
- Electrical conductivity
- Thermal conductivity
- Atomic radius
- Ionic radius
- Electronegativity
Chemical properties are those that can be observed during a chemical reaction. Some examples of chemical properties are:
- Reactivity with acids
- Reactivity with oxygen
- Reactivity with water
- Reduction potential
- Oxidation potential
Meyer observed that when the elements are arranged in order of increasing atomic weights, there is a periodicity in their physical and chemical properties. This means that elements with similar atomic weights have similar physical and chemical properties. For example, lithium, sodium, and potassium have similar physical and chemical properties because they all belong to the same group and have similar atomic weights.
Conclusion:
Lothar Meyer proposed the periodic table in 1864. He arranged the elements in order of increasing atomic weights. He noticed that similarities appeared in both physical and chemical properties of the elements. When the elements are arranged in order of increasing atomic weights, there is a periodicity in their physical and chemical properties.
Horizontal rows in the periodic table are called:- a)Cell
- b)Table
- c)Groups
- d)Periods
Correct answer is option 'D'. Can you explain this answer?
Horizontal rows in the periodic table are called:
a)
Cell
b)
Table
c)
Groups
d)
Periods
|
Rohan Singh answered |
The Periodic Table: Families and Periods. In the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.
Can you explain the answer of this question below:In the modern periodic table, which period contains 32 elements?
- A:
Sixth
- B:
First
- C:
Seventh
- D:
Second
The answer is a.
In the modern periodic table, which period contains 32 elements?
Sixth
First
Seventh
Second
|
Preeti Iyer answered |
The answer is c.
The total number of electrons that can be accommodated in seventh period are 2 ( in 7s) + 14(in 5f) + 10(in 6d )+ 6(in 7p) = 32. The maximum number of elements present in it is 32.
Among the following statements the one that is not true about Mendeleev’s Periodic Table is:- a)Elements of group 7 and 8 were arranged on the basis of equivalent weights
- b)Some elements in the same group differ in their properties
- c)Elements were arranged on the basis of atomic weights
- d)The position of hydrogen was not justified
Correct answer is option 'A'. Can you explain this answer?
Among the following statements the one that is not true about Mendeleev’s Periodic Table is:
a)
Elements of group 7 and 8 were arranged on the basis of equivalent weights
b)
Some elements in the same group differ in their properties
c)
Elements were arranged on the basis of atomic weights
d)
The position of hydrogen was not justified
|
Om Desai answered |
In Mendeleev’s periodic table, elements were arranged on the basis of atomic weights.
Eka silicon predicted by Mendeleev is which element:- a)Germanium
- b)Aluminium
- c)Gallium
- d)Sodium
Correct answer is option 'A'. Can you explain this answer?
Eka silicon predicted by Mendeleev is which element:
a)
Germanium
b)
Aluminium
c)
Gallium
d)
Sodium
|
Suresh Iyer answered |
Mendeleev predicted the existence of 'eka-silicon', which would fit into a gap next to silicon. The element germanium was discovered later. Its properties were found to be similar to the predicted ones and confirmed Mendeleev's periodic table.
Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass?- a)Newlands
- b)Lothar Meyer
- c)Henry Moseley
- d)Meyer
Correct answer is option 'C'. Can you explain this answer?
Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass?
a)
Newlands
b)
Lothar Meyer
c)
Henry Moseley
d)
Meyer
|
|
Pooja Shah answered |
The scientist who first of all showed that the atomic number is more fundamental property of an element than its atomic mass was Henry Moseley.
Eka aluminium predicted by Mendeleev is which element?- a)Germanium
- b)Magnesium
- c)Gallium
- d)Sodium
Correct answer is option 'C'. Can you explain this answer?
Eka aluminium predicted by Mendeleev is which element?
a)
Germanium
b)
Magnesium
c)
Gallium
d)
Sodium
|
Gaurav Kumar answered |
Eka aluminium predicted by Mendeleev is Gallium. Eka-aluminium and gallium are the two names of the same element as Eka -Aluminum has almost exactly the same properties as the actual properties of the gallium element.
According to Dobereiner’s law of triads the number of elements present in each group is:
- a)2
- b)4
- c)5
- d)3
Correct answer is option 'D'. Can you explain this answer?
According to Dobereiner’s law of triads the number of elements present in each group is:
a)
2
b)
4
c)
5
d)
3
|
|
Geetika Shah answered |
- According to Dobereiner's law of triads each triad contains three elements.
- He also noticed that the middle element of each of the triads had an atomic weight about halfway between the atomic weights of the other two.
Moseley performed experiments and studied the frequencies of which radiations emitted from the elements?- a)Gamma rays
- b)X-rays
- c)UV rays
- d)Infra red rays
Correct answer is option 'B'. Can you explain this answer?
Moseley performed experiments and studied the frequencies of which radiations emitted from the elements?
a)
Gamma rays
b)
X-rays
c)
UV rays
d)
Infra red rays
|
|
Naina Bansal answered |
Moseley performed experiments and studied the frequencies of the X-rays emitted from the elements.
Johann Dobereiner classified elements in group of three elements called as- a)Trinity
- b)Trials
- c)Triads
- d)Diads
Correct answer is option 'C'. Can you explain this answer?
Johann Dobereiner classified elements in group of three elements called as
a)
Trinity
b)
Trials
c)
Triads
d)
Diads
|
|
Om Desai answered |
In 1829, Johann Dobereiner, a German scientist made some groups of three elements each and called them triads.
He observed that the atomic mass of the middle element of a triad was nearly equal to the arithmetic mean of the atomic masses of the other two elements. All three elements of a triad were similar in their properties.
Mendeleev predicted the existence of which element/elements in the periodic table?- a)Gallium
- b)Sodium and germanium
- c)Gallium and germanium
- d)Germanium and Gold
Correct answer is option 'C'. Can you explain this answer?
Mendeleev predicted the existence of which element/elements in the periodic table?
a)
Gallium
b)
Sodium and germanium
c)
Gallium and germanium
d)
Germanium and Gold
|
|
Neha Joshi answered |
Gallium and Germanium were the elements not discovered at that time and Mendeleev put gaps in the periodic table.
Gallium was called as Eka aluminium
Germanium was called as Eka silicon
Gallium was called as Eka aluminium
Germanium was called as Eka silicon
The basis of long form of periodic table is:- a)Mass number
- b)Atomic weight
- c)Atomic number
- d)Ionic radius
Correct answer is option 'C'. Can you explain this answer?
The basis of long form of periodic table is:
a)
Mass number
b)
Atomic weight
c)
Atomic number
d)
Ionic radius
|
|
Nandini Patel answered |
In long form of periodic table elements are arranged in increasing order of their Atomic number.
Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:- a)Third element
- b)Fourth element
- c)Second element
- d)First element
Correct answer is option 'D'. Can you explain this answer?
Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:
a)
Third element
b)
Fourth element
c)
Second element
d)
First element
|
Hansa Sharma answered |
According to Newlands' law of octaves when the elements are arranged in order of increasing atomic weights then every eighth element has properties similar to that of the first element.
Uniform circular motion is called continuously accelerated motion mainly because its :- a)direction of motion changes
- b)speed remains the same
- c)velocity remains the same
- d)direction of motion does not change
Correct answer is option 'A'. Can you explain this answer?
Uniform circular motion is called continuously accelerated motion mainly because its :
a)
direction of motion changes
b)
speed remains the same
c)
velocity remains the same
d)
direction of motion does not change
|
Krishna Iyer answered |
An accelerating body is an object that is changing its velocity. And since velocity is a vector that has both magnitude and direction, a change in either the magnitude or the direction constitutes a change in the velocity.
Hence a uniform circular motion is a accelerated motion because direction of motion keeps on changing
Hence a uniform circular motion is a accelerated motion because direction of motion keeps on changing
Mendeleev's Periodic Table was arranged primarily based on which property of elements?- a)Atomic mass
- b)Electronegativity
- c)Ionization energy
- d)Atomic radius
Correct answer is option 'A'. Can you explain this answer?
Mendeleev's Periodic Table was arranged primarily based on which property of elements?
a)
Atomic mass
b)
Electronegativity
c)
Ionization energy
d)
Atomic radius
|
Lead Academy answered |
Mendeleev's Periodic Table was initially arranged based on increasing atomic mass. He noticed that elements with similar properties appeared at regular intervals when arranged in order of increasing atomic mass.
Chalcogens belong to which group of the periodic table?- a)Group 14
- b)Group 15
- c)Group 16
- d)Group 17
Correct answer is option 'C'. Can you explain this answer?
Chalcogens belong to which group of the periodic table?
a)
Group 14
b)
Group 15
c)
Group 16
d)
Group 17
|
Yug Laxmi Gadhwal answered |
The elements in group 16 of the periodic table are called chalcogens because the word "chalcogen" means "ore-forming elements" ,many elements can be extracted from sulphide or oxide ores.
Mycorrhizal roots of ____ are associated with some fungal symbionts.- a)Pinus
- b)Cedrus
- c)Cycas
- d)Ginkgo
Correct answer is option 'A'. Can you explain this answer?
Mycorrhizal roots of ____ are associated with some fungal symbionts.
a)
Pinus
b)
Cedrus
c)
Cycas
d)
Ginkgo
|
|
Nayanika Menon answered |
The mycorrhizal roots of Pinus are associated with some fungal symbionts.
Mycorrhizal roots are a type of root system that form a mutualistic association with certain fungi. This symbiotic relationship benefits both the plant and the fungi involved. The mycorrhizal association enhances the plant's ability to absorb nutrients from the soil, particularly phosphorus, while the fungi receive carbohydrates from the plant.
Pinus and Mycorrhizal Association:
Pinus, commonly known as pine trees, are known to form mycorrhizal associations with certain fungi. In particular, they form ectomycorrhizal associations, which involve fungal hyphae forming a sheath around the root tips without penetrating the root cells.
Benefits of Mycorrhizal Association for Pinus:
1. Enhanced Nutrient Absorption: The fungal hyphae extend into the soil, greatly increasing the surface area available for nutrient absorption. This allows Pinus to access nutrients, such as phosphorus, that are typically less available in the soil.
2. Water Uptake: The mycorrhizal association also improves the plant's ability to take up water from the soil. The extensive fungal network helps in the absorption and transportation of water to the plant roots.
3. Disease Resistance: The fungi involved in the mycorrhizal association can provide a level of protection against soil-borne pathogens. They may compete with pathogens for resources or produce compounds that inhibit their growth.
4. Environmental Adaptation: The mycorrhizal association can help Pinus trees adapt to various environmental conditions, such as drought or nutrient-poor soils. The fungi enhance the plant's ability to withstand stress and improve its overall fitness.
Other Options:
- Cedrus: Cedrus, commonly known as cedar trees, also form mycorrhizal associations. However, the specific fungal symbionts may differ from those associated with Pinus.
- Cycas: Cycas, a type of gymnosperm, also forms mycorrhizal associations. However, the specific fungal symbionts may differ from those associated with Pinus.
- Ginkgo: Ginkgo, another gymnosperm, is known to form mycorrhizal associations. However, the specific fungal symbionts may differ from those associated with Pinus.
In conclusion, the mycorrhizal roots of Pinus are associated with certain fungal symbionts, forming an ectomycorrhizal association. This association provides numerous benefits to the plant, including enhanced nutrient absorption, water uptake, disease resistance, and environmental adaptation.
Mycorrhizal roots are a type of root system that form a mutualistic association with certain fungi. This symbiotic relationship benefits both the plant and the fungi involved. The mycorrhizal association enhances the plant's ability to absorb nutrients from the soil, particularly phosphorus, while the fungi receive carbohydrates from the plant.
Pinus and Mycorrhizal Association:
Pinus, commonly known as pine trees, are known to form mycorrhizal associations with certain fungi. In particular, they form ectomycorrhizal associations, which involve fungal hyphae forming a sheath around the root tips without penetrating the root cells.
Benefits of Mycorrhizal Association for Pinus:
1. Enhanced Nutrient Absorption: The fungal hyphae extend into the soil, greatly increasing the surface area available for nutrient absorption. This allows Pinus to access nutrients, such as phosphorus, that are typically less available in the soil.
2. Water Uptake: The mycorrhizal association also improves the plant's ability to take up water from the soil. The extensive fungal network helps in the absorption and transportation of water to the plant roots.
3. Disease Resistance: The fungi involved in the mycorrhizal association can provide a level of protection against soil-borne pathogens. They may compete with pathogens for resources or produce compounds that inhibit their growth.
4. Environmental Adaptation: The mycorrhizal association can help Pinus trees adapt to various environmental conditions, such as drought or nutrient-poor soils. The fungi enhance the plant's ability to withstand stress and improve its overall fitness.
Other Options:
- Cedrus: Cedrus, commonly known as cedar trees, also form mycorrhizal associations. However, the specific fungal symbionts may differ from those associated with Pinus.
- Cycas: Cycas, a type of gymnosperm, also forms mycorrhizal associations. However, the specific fungal symbionts may differ from those associated with Pinus.
- Ginkgo: Ginkgo, another gymnosperm, is known to form mycorrhizal associations. However, the specific fungal symbionts may differ from those associated with Pinus.
In conclusion, the mycorrhizal roots of Pinus are associated with certain fungal symbionts, forming an ectomycorrhizal association. This association provides numerous benefits to the plant, including enhanced nutrient absorption, water uptake, disease resistance, and environmental adaptation.
In Dobereiner's Triads, elements were grouped based on their similar chemical properties. Which of the following elements was not part of any known Dobereiner's Triad?- a)Lithium
- b)Sodium
- c)Carbon
- d)Chlorine
Correct answer is option 'C'. Can you explain this answer?
In Dobereiner's Triads, elements were grouped based on their similar chemical properties. Which of the following elements was not part of any known Dobereiner's Triad?
a)
Lithium
b)
Sodium
c)
Carbon
d)
Chlorine
|
EduRev NEET answered |
Dobereiner's Triads were groups of three elements with similar chemical properties, where the atomic mass of the middle element was approximately equal to the average of the other two. Carbon, being a nonmetal with a unique set of properties, did not fit into any known triad.
According to Moseley, a straight-line graph is obtained on plotting-- a)The frequencies of characteristic X-rays of elements against their atomic numbers.
- b)The square of the frequencies of characteristic X-rays of elements against their atomic numbers
- c)The square root of the frequencies of characteristic X-rays of elements against their atomic numbers
- d)The reciprocal of the frequencies of characteristic X-rays of elements against their atomic numbers.
Correct answer is option 'C'. Can you explain this answer?
According to Moseley, a straight-line graph is obtained on plotting-
a)
The frequencies of characteristic X-rays of elements against their atomic numbers.
b)
The square of the frequencies of characteristic X-rays of elements against their atomic numbers
c)
The square root of the frequencies of characteristic X-rays of elements against their atomic numbers
d)
The reciprocal of the frequencies of characteristic X-rays of elements against their atomic numbers.
|
|
Ishita Mukherjee answered |
**Explanation:**
**Moseley's Law:**
Moseley's Law states that the square root of the frequency of characteristic X-rays emitted by an element is directly proportional to the atomic number of the element.
**Plotting the Frequencies of Characteristic X-rays:**
In order to understand Moseley's Law and obtain a straight-line graph, we need to plot the frequencies of characteristic X-rays of elements against their atomic numbers. This means we will have the frequency (f) on the y-axis and the atomic number (Z) on the x-axis.
**Interpreting the Options:**
a) The frequencies of characteristic X-rays of elements against their atomic numbers: This option is correct because it represents the correct plot required to obtain a straight-line graph according to Moseley's Law.
b) The square of the frequencies of characteristic X-rays of elements against their atomic numbers: This option is incorrect because squaring the frequencies would not result in a straight-line graph. The relationship between the square of the frequency and atomic number is not linear.
c) The square root of the frequencies of characteristic X-rays of elements against their atomic numbers: This option is incorrect because taking the square root of the frequencies would not result in a straight-line graph. The relationship between the square root of the frequency and atomic number is not linear.
d) The reciprocal of the frequencies of characteristic X-rays of elements against their atomic numbers: This option is incorrect because taking the reciprocal of the frequencies would not result in a straight-line graph. The relationship between the reciprocal of the frequency and atomic number is not linear.
**Conclusion:**
Based on Moseley's Law, the correct option is a) The frequencies of characteristic X-rays of elements against their atomic numbers. This plot will result in a straight-line graph, demonstrating the linear relationship between the frequency of characteristic X-rays and the atomic number of elements.
**Moseley's Law:**
Moseley's Law states that the square root of the frequency of characteristic X-rays emitted by an element is directly proportional to the atomic number of the element.
**Plotting the Frequencies of Characteristic X-rays:**
In order to understand Moseley's Law and obtain a straight-line graph, we need to plot the frequencies of characteristic X-rays of elements against their atomic numbers. This means we will have the frequency (f) on the y-axis and the atomic number (Z) on the x-axis.
**Interpreting the Options:**
a) The frequencies of characteristic X-rays of elements against their atomic numbers: This option is correct because it represents the correct plot required to obtain a straight-line graph according to Moseley's Law.
b) The square of the frequencies of characteristic X-rays of elements against their atomic numbers: This option is incorrect because squaring the frequencies would not result in a straight-line graph. The relationship between the square of the frequency and atomic number is not linear.
c) The square root of the frequencies of characteristic X-rays of elements against their atomic numbers: This option is incorrect because taking the square root of the frequencies would not result in a straight-line graph. The relationship between the square root of the frequency and atomic number is not linear.
d) The reciprocal of the frequencies of characteristic X-rays of elements against their atomic numbers: This option is incorrect because taking the reciprocal of the frequencies would not result in a straight-line graph. The relationship between the reciprocal of the frequency and atomic number is not linear.
**Conclusion:**
Based on Moseley's Law, the correct option is a) The frequencies of characteristic X-rays of elements against their atomic numbers. This plot will result in a straight-line graph, demonstrating the linear relationship between the frequency of characteristic X-rays and the atomic number of elements.
At present how many elements are known?- a)110
- b)118
- c)63
- d)105
Correct answer is option 'B'. Can you explain this answer?
At present how many elements are known?
a)
110
b)
118
c)
63
d)
105
|
|
Akash Gupta answered |
The Placement of Halogens in the Modern Periodic Table
Halogens are placed in the 17th group of the modern periodic table. This group is also known as Group 17 or Group VIIA.
Explanation:
The modern periodic table is organized based on the atomic number and electronic configuration of elements. It is divided into several groups or families, each containing elements with similar properties and chemical behavior.
Halogens:
Halogens are a group of highly reactive nonmetallic elements that belong to Group 17 of the periodic table. The group consists of five elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Properties of Halogens:
Halogens exhibit similar chemical properties due to their electronic configuration. They all have seven valence electrons in their outermost energy level, resulting in a strong tendency to gain one electron to achieve a stable electron configuration.
Some key properties of halogens include:
1. High electronegativity: Halogens are highly electronegative elements, meaning they have a strong ability to attract electrons towards themselves.
2. Reactivity: Halogens are highly reactive and readily form compounds with other elements, especially metals.
3. Diatomic molecules: In their elemental form, halogens exist as diatomic molecules (F2, Cl2, Br2, I2) due to the sharing of a pair of electrons between two atoms.
4. Color and state: Halogens exhibit distinct colors and states at room temperature, ranging from pale yellow (fluorine) to dark purple (iodine). Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid.
Group 17 Placement:
Halogens are placed in Group 17 of the periodic table because they all have similar electronic configurations. They have seven valence electrons in their outermost energy level, resulting in the same general tendency to gain one electron to achieve a stable octet electron configuration.
Group 17 is also known as the halogens group or the halogen family. It is the second-to-last group on the right-hand side of the periodic table, just before the noble gases (Group 18).
Conclusion:
In conclusion, halogens are placed in the 17th group (Group 17 or Group VIIA) of the modern periodic table. They exhibit similar properties due to their electronic configuration and have a strong tendency to gain one electron to achieve a stable electron configuration. Understanding the placement of elements in the periodic table helps in predicting their properties and chemical behavior.
Halogens are placed in the 17th group of the modern periodic table. This group is also known as Group 17 or Group VIIA.
Explanation:
The modern periodic table is organized based on the atomic number and electronic configuration of elements. It is divided into several groups or families, each containing elements with similar properties and chemical behavior.
Halogens:
Halogens are a group of highly reactive nonmetallic elements that belong to Group 17 of the periodic table. The group consists of five elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Properties of Halogens:
Halogens exhibit similar chemical properties due to their electronic configuration. They all have seven valence electrons in their outermost energy level, resulting in a strong tendency to gain one electron to achieve a stable electron configuration.
Some key properties of halogens include:
1. High electronegativity: Halogens are highly electronegative elements, meaning they have a strong ability to attract electrons towards themselves.
2. Reactivity: Halogens are highly reactive and readily form compounds with other elements, especially metals.
3. Diatomic molecules: In their elemental form, halogens exist as diatomic molecules (F2, Cl2, Br2, I2) due to the sharing of a pair of electrons between two atoms.
4. Color and state: Halogens exhibit distinct colors and states at room temperature, ranging from pale yellow (fluorine) to dark purple (iodine). Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid.
Group 17 Placement:
Halogens are placed in Group 17 of the periodic table because they all have similar electronic configurations. They have seven valence electrons in their outermost energy level, resulting in the same general tendency to gain one electron to achieve a stable octet electron configuration.
Group 17 is also known as the halogens group or the halogen family. It is the second-to-last group on the right-hand side of the periodic table, just before the noble gases (Group 18).
Conclusion:
In conclusion, halogens are placed in the 17th group (Group 17 or Group VIIA) of the modern periodic table. They exhibit similar properties due to their electronic configuration and have a strong tendency to gain one electron to achieve a stable electron configuration. Understanding the placement of elements in the periodic table helps in predicting their properties and chemical behavior.
Question:
Which of the following statements about gymnosperms is correct? - Gymnosperms are homosporous and produce only microspores.
- The reduced male gametophyte in gymnosperms is known as the microsporangia.
- The female strobili bear megasporophylls with ovule or megasporangia.
- The multicellular female gametophyte develops within the megasporangium and is retained there.
- a)1 and 2
- b)2 and 3
- c)3 and 4
- d)1 and 4
Correct answer is option 'C'. Can you explain this answer?
Question:
Which of the following statements about gymnosperms is correct?
Which of the following statements about gymnosperms is correct?
- Gymnosperms are homosporous and produce only microspores.
- The reduced male gametophyte in gymnosperms is known as the microsporangia.
- The female strobili bear megasporophylls with ovule or megasporangia.
- The multicellular female gametophyte develops within the megasporangium and is retained there.
a)
1 and 2
b)
2 and 3
c)
3 and 4
d)
1 and 4
|
Ambition Institute answered |
Correct answer: 3 and 4
Explanation:
- Statement 1 is incorrect: Gymnosperms are heterosporous, they produce haploid microspores and megaspores.
- Statement 2 is incorrect: The reduced male gametophyte is called a pollen grain, not the microsporangia.
What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?- a)They have independent free-living existence.
- b)They remain within the sporangia retained on the sporophytes.
- c)They are carried by water currents.
- d)They develop into fruits directly.
Correct answer is option 'B'. Can you explain this answer?
What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?
a)
They have independent free-living existence.
b)
They remain within the sporangia retained on the sporophytes.
c)
They are carried by water currents.
d)
They develop into fruits directly.
|
Mohit Rajpoot answered |
Unlike bryophytes and pteridophytes, in gymnosperms the male and the female gametophytes do not have an independent free-living existence. They remain within the sporangia retained on the sporophytes.
Read the following statements :A. The male or female cones or strobili may be borne on same tree in Pinus.B. In Cycas male cones and megasporophylls are borne on different trees.C. Stem of Cycas is branched and of Pinus and Cedrus is unbranched.D. In gymnosperms generally tap roots are found.Select the correct statements.- a)A, B
- b). A, B, D
- c)A, B, C
- d). C, D
Correct answer is option 'B'. Can you explain this answer?
Read the following statements :
A. The male or female cones or strobili may be borne on same tree in Pinus.
B. In Cycas male cones and megasporophylls are borne on different trees.
C. Stem of Cycas is branched and of Pinus and Cedrus is unbranched.
D. In gymnosperms generally tap roots are found.
Select the correct statements.
a)
A, B
b)
. A, B, D
c)
A, B, C
d)
. C, D
|
Top Rankers answered |
Correct answer:. A, B, D
Explanation:
- Statement A is correct: In Pinus, male and female cones are typically borne on the same tree (monoecious).
- Statement B is correct: In Cycas, male cones and megasporophylls (female cones) are borne on different trees (dioecious).
- Statement C is incorrect: The stem of Cycas is unbranched, while the stems of Pinus and Cedrus can be branched.
- Statement D is correct: Gymnosperms generally have tap roots.
Canada balsam, a mounting agent used to make permanent slides is obtained from the species of- a)Abies
- b)Cedrus
- c)Pinus
- d)Juniperus
Correct answer is option 'A'. Can you explain this answer?
Canada balsam, a mounting agent used to make permanent slides is obtained from the species of
a)
Abies
b)
Cedrus
c)
Pinus
d)
Juniperus
|
Vivek Patel answered |
Canada balsam is obtained from Abies balsams The resin does not crystallise or granulate on drying. It has a high refractive index as that of glass and is used as a mounting medium for microscopic object and as a cement for lenses in optical work.
In circular motion:- a)Radial acceleration is non-zero
- b)Radial velocity is zero
- c)Body is in equilibrium
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
In circular motion:
a)
Radial acceleration is non-zero
b)
Radial velocity is zero
c)
Body is in equilibrium
d)
All of the above
|
|
Stuti Joshi answered |
Circular motion involves the motion of an object in a circular path. The object moves around the center of the circle with a constant speed. In circular motion, the object experiences various types of acceleration and velocity. Let’s discuss the given options to understand circular motion in detail.
Radial acceleration is non-zero:
Radial acceleration is the acceleration of an object towards the center of the circle. In circular motion, the direction of velocity changes continuously, and hence the object experiences a change in direction. This change in direction leads to the acceleration of the object towards the center of the circle, known as radial acceleration. Therefore, option ‘a’ is correct.
Radial velocity is zero:
Radial velocity is the velocity of an object in the radial direction, i.e., towards the center of the circle. In circular motion, the object moves in a circular path without any radial motion, i.e., the object moves perpendicular to the radius of the circle. Hence, radial velocity is zero in circular motion. Therefore, option ‘b’ is incorrect.
Body is in equilibrium:
Equilibrium is a state where the object is at rest or moves with a constant velocity. In circular motion, the object moves with a constant speed, but the direction of the velocity changes continuously. Therefore, the object is not at rest, but it is also not moving with a constant velocity. Hence, the body is not in equilibrium in circular motion. Therefore, option ‘c’ is incorrect.
All of the above:
From the above discussion, we can conclude that radial acceleration is non-zero, radial velocity is zero, and the body is not in equilibrium in circular motion. Therefore, option ‘d’ is the correct answer.
Conclusion:
Circular motion involves the motion of an object in a circular path. The object experiences various types of acceleration and velocity in circular motion. In circular motion, radial acceleration is non-zero, radial velocity is zero, and the body is not in equilibrium.
Radial acceleration is non-zero:
Radial acceleration is the acceleration of an object towards the center of the circle. In circular motion, the direction of velocity changes continuously, and hence the object experiences a change in direction. This change in direction leads to the acceleration of the object towards the center of the circle, known as radial acceleration. Therefore, option ‘a’ is correct.
Radial velocity is zero:
Radial velocity is the velocity of an object in the radial direction, i.e., towards the center of the circle. In circular motion, the object moves in a circular path without any radial motion, i.e., the object moves perpendicular to the radius of the circle. Hence, radial velocity is zero in circular motion. Therefore, option ‘b’ is incorrect.
Body is in equilibrium:
Equilibrium is a state where the object is at rest or moves with a constant velocity. In circular motion, the object moves with a constant speed, but the direction of the velocity changes continuously. Therefore, the object is not at rest, but it is also not moving with a constant velocity. Hence, the body is not in equilibrium in circular motion. Therefore, option ‘c’ is incorrect.
All of the above:
From the above discussion, we can conclude that radial acceleration is non-zero, radial velocity is zero, and the body is not in equilibrium in circular motion. Therefore, option ‘d’ is the correct answer.
Conclusion:
Circular motion involves the motion of an object in a circular path. The object experiences various types of acceleration and velocity in circular motion. In circular motion, radial acceleration is non-zero, radial velocity is zero, and the body is not in equilibrium.
In circular motion, the- a)Direction of motion is fixed
- b)Direction of motion changes continuously
- c)Acceleration is zero
- d)Velocity is constant
Correct answer is option 'B'. Can you explain this answer?
In circular motion, the
a)
Direction of motion is fixed
b)
Direction of motion changes continuously
c)
Acceleration is zero
d)
Velocity is constant
|
Sonal Dey answered |
Circular motion refers to the motion of an object along a circular path. In circular motion, the direction of motion changes continuously, which is why the correct answer is option 'B'.
Explanation:
1. Direction of motion changes continuously:
In circular motion, an object moves along a curved path, constantly changing its direction. This is because the object is always changing its position with respect to the center of the circle. As the object moves around the circle, it continuously changes its orientation, resulting in a continuous change in the direction of motion.
2. Velocity is constant:
While the direction of motion changes continuously in circular motion, the magnitude of velocity remains constant. The velocity of an object in circular motion is defined as the rate of change of displacement with respect to time. Since the object is moving along a circular path, its displacement is constantly changing direction, but its magnitude remains constant. Therefore, the object's velocity in circular motion is constant, but its direction changes continuously.
3. Acceleration is zero:
In circular motion, the acceleration of an object is directed towards the center of the circle and is known as centripetal acceleration. The magnitude of centripetal acceleration is given by the formula a = v^2 / r, where v is the velocity of the object and r is the radius of the circle. However, despite the presence of acceleration, the net acceleration in circular motion is zero in the absence of any external forces. This is because the centripetal acceleration is always perpendicular to the velocity vector, resulting in a constant magnitude of velocity and no change in speed.
In summary:
In circular motion, the direction of motion changes continuously, while the velocity remains constant. The acceleration is zero in the absence of any external forces.
Explanation:
1. Direction of motion changes continuously:
In circular motion, an object moves along a curved path, constantly changing its direction. This is because the object is always changing its position with respect to the center of the circle. As the object moves around the circle, it continuously changes its orientation, resulting in a continuous change in the direction of motion.
2. Velocity is constant:
While the direction of motion changes continuously in circular motion, the magnitude of velocity remains constant. The velocity of an object in circular motion is defined as the rate of change of displacement with respect to time. Since the object is moving along a circular path, its displacement is constantly changing direction, but its magnitude remains constant. Therefore, the object's velocity in circular motion is constant, but its direction changes continuously.
3. Acceleration is zero:
In circular motion, the acceleration of an object is directed towards the center of the circle and is known as centripetal acceleration. The magnitude of centripetal acceleration is given by the formula a = v^2 / r, where v is the velocity of the object and r is the radius of the circle. However, despite the presence of acceleration, the net acceleration in circular motion is zero in the absence of any external forces. This is because the centripetal acceleration is always perpendicular to the velocity vector, resulting in a constant magnitude of velocity and no change in speed.
In summary:
In circular motion, the direction of motion changes continuously, while the velocity remains constant. The acceleration is zero in the absence of any external forces.
Newland's Law of Octaves suggested that elements exhibited similar properties at regular intervals. However, this law failed to accommodate the discovery of:- a)Noble gases
- b)Halogens
- c)Transition metals
- d)Lanthanides and Actinides
Correct answer is option 'A'. Can you explain this answer?
Newland's Law of Octaves suggested that elements exhibited similar properties at regular intervals. However, this law failed to accommodate the discovery of:
a)
Noble gases
b)
Halogens
c)
Transition metals
d)
Lanthanides and Actinides
|
|
Lead Academy answered |
Newland's Law of Octaves arranged elements in groups of seven, resembling musical octaves. However, this law did not leave room for the discovery of noble gases, which have very different properties compared to the elements in Newland's groups.
The _______ circular motion describes as the motion of an object in a circular path with a _______ speed. Fill in the blank.
- a)Non-uniform, constant
- b)Uniform, constant
- c)Non-uniform, varying
- d)Uniform, Varying
Correct answer is option 'B,C'. Can you explain this answer?
The _______ circular motion describes as the motion of an object in a circular path with a _______ speed. Fill in the blank.
a)
Non-uniform, constant
b)
Uniform, constant
c)
Non-uniform, varying
d)
Uniform, Varying
|
|
Nandini Iyer answered |
Therefore, the correct multiple answers are:
2. Uniform, constant
3. Non-uniform, varying
3. Non-uniform, varying
-
Non-uniform, constant – This is incorrect. If the motion is non-uniform, the speed cannot be constant.
-
Uniform, constant – This is correct. In uniform circular motion, the speed is constant.
-
Non-uniform, varying – This is correct. In non-uniform circular motion, the speed varies.
-
Uniform, varying – This is incorrect. If the motion is uniform, the speed must remain constant, so it cannot be varying.
During the reproductive process of gymnosperms:A. The megaspore mother cell is differentiated from one of the cells of the nucellus
B. The nucellus is protected by envelopes, forming the ovule.
C. The ovules are borne on megasporophylls which may be clustered to form the female conesD. The megaspore mother cell divides meiotically to form four megaspores. One of the megaspores enclosed within the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia or female sex organsHow many correct statements?- a)two
- b)one
- c)None
- d)Four
Correct answer is option 'D'. Can you explain this answer?
During the reproductive process of gymnosperms:
A. The megaspore mother cell is differentiated from one of the cells of the nucellus
B. The nucellus is protected by envelopes, forming the ovule.
C. The ovules are borne on megasporophylls which may be clustered to form the female cones
B. The nucellus is protected by envelopes, forming the ovule.
C. The ovules are borne on megasporophylls which may be clustered to form the female cones
D. The megaspore mother cell divides meiotically to form four megaspores. One of the megaspores enclosed within the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia or female sex organs
How many correct statements?
a)
two
b)
one
c)
None
d)
Four
|
Bs Academy answered |
The megaspore mother cell is differentiated from one of the cells of the nucellus. The nucellus is protected by envelopes and the composite structure is called an ovule. The ovules are borne on megasporophylls which may be clustered to form the female cones. The megaspore mother cell divides meiotically to form four megaspores. One of the megaspores enclosed within the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia or female sex organs. The multicellular female gametophyte is also retained within megasporangium
The features seen in the gymnosperm Cycas include:I. Coralloid rootsII. Unbranched stemsIII. Pinnate persistent leaves for a few yearsIV. Male cones and megasporophyllys borne on same plant- a)I and II only
- b) I and IV only
- c) I, II and III only
- d)I, II, III, and IV
Correct answer is option 'C'. Can you explain this answer?
The features seen in the gymnosperm Cycas include:
I. Coralloid roots
II. Unbranched stems
III. Pinnate persistent leaves for a few years
IV. Male cones and megasporophyllys borne on same plant
a)
I and II only
b)
I and IV only
c)
I, II and III only
d)
I, II, III, and IV
|
Ciel Knowledge answered |
The correct answer is: C: I, II, and III only
- I. Coralloid roots: Gymnosperm Cycas has coralloid roots that contain symbiotic cyanobacteria, aiding in nitrogen fixation.
- II. Unbranched stems: Cycas exhibits unbranched stems, which is a characteristic feature of this gymnosperm.
- III. Pinnate persistent leaves for a few years: Cycas has pinnate leaves that persist for several years, contributing to its distinct appearance.
- IV. Male cones and megasporophylls borne on the same plant: This option is incorrect as male and female reproductive structures are typically on separate Cycas plants.
- I. Coralloid roots: Gymnosperm Cycas has coralloid roots that contain symbiotic cyanobacteria, aiding in nitrogen fixation.
- II. Unbranched stems: Cycas exhibits unbranched stems, which is a characteristic feature of this gymnosperm.
- III. Pinnate persistent leaves for a few years: Cycas has pinnate leaves that persist for several years, contributing to its distinct appearance.
- IV. Male cones and megasporophylls borne on the same plant: This option is incorrect as male and female reproductive structures are typically on separate Cycas plants.
Which one of the following is most probably not a case of uniform circular motion?- a)Motion of a racing car on a circular track
- b)Motion of the moon around the earth
- c)Motion of a toy train on a circular track
- d)Motion of seconds hand on the circular dial of a watch
Correct answer is option 'A'. Can you explain this answer?
Which one of the following is most probably not a case of uniform circular motion?
a)
Motion of a racing car on a circular track
b)
Motion of the moon around the earth
c)
Motion of a toy train on a circular track
d)
Motion of seconds hand on the circular dial of a watch
|
Jhanvi Chakraborty answered |
Understanding Uniform Circular Motion
Uniform circular motion refers to motion along a circular path at a constant speed. In this scenario, the object’s speed remains constant, but its direction changes continuously, resulting in acceleration towards the center of the circle.
Analyzing the Options
- Motion of a racing car on a circular track
- This motion is often not uniform because a racing car changes its speed while navigating turns. Drivers accelerate or decelerate, which means the speed is not constant.
- Motion of the moon around the earth
- The moon moves in a nearly circular orbit at a constant speed, making this a classic case of uniform circular motion.
- Motion of a toy train on a circular track
- If the toy train moves at a constant speed around the track, it exemplifies uniform circular motion.
- Motion of the seconds hand on the circular dial of a watch
- The seconds hand moves at a constant speed, completing a full revolution in a fixed time, thus representing uniform circular motion.
Conclusion
The correct answer is option 'A' – the motion of a racing car on a circular track. This is because the car typically experiences variations in speed, unlike the other options, which maintain a constant speed while moving in a circular path.
Uniform circular motion refers to motion along a circular path at a constant speed. In this scenario, the object’s speed remains constant, but its direction changes continuously, resulting in acceleration towards the center of the circle.
Analyzing the Options
- Motion of a racing car on a circular track
- This motion is often not uniform because a racing car changes its speed while navigating turns. Drivers accelerate or decelerate, which means the speed is not constant.
- Motion of the moon around the earth
- The moon moves in a nearly circular orbit at a constant speed, making this a classic case of uniform circular motion.
- Motion of a toy train on a circular track
- If the toy train moves at a constant speed around the track, it exemplifies uniform circular motion.
- Motion of the seconds hand on the circular dial of a watch
- The seconds hand moves at a constant speed, completing a full revolution in a fixed time, thus representing uniform circular motion.
Conclusion
The correct answer is option 'A' – the motion of a racing car on a circular track. This is because the car typically experiences variations in speed, unlike the other options, which maintain a constant speed while moving in a circular path.
For a particle in a non- uniform accelerated circular motion
- a)Velocity is transverse and acceleration has both radial and transverse components
- b)Velocity is transverse and acceleration is radial only
- c)Velocity is radial and acceleration has both radial and transverse components
- d)Velocity is radial and acceleration is transverse only
Correct answer is option 'A'. Can you explain this answer?
For a particle in a non- uniform accelerated circular motion
a)
Velocity is transverse and acceleration has both radial and transverse components
b)
Velocity is transverse and acceleration is radial only
c)
Velocity is radial and acceleration has both radial and transverse components
d)
Velocity is radial and acceleration is transverse only
|
|
Sandeep Chawla answered |
Explanation:
Non-uniform circular motion is the motion of an object moving in a circular path with a varying speed. The direction of the velocity and acceleration of an object in non-uniform circular motion changes at every point on the circular path.
Velocity:
Velocity is the rate of change of displacement with respect to time. In non-uniform circular motion, the velocity of the object is always tangent to the circular path. The magnitude of the velocity changes at every point on the circular path.
Acceleration:
Acceleration is the rate of change of velocity with respect to time. In non-uniform circular motion, the acceleration of the object is not constant. It changes at every point on the circular path.
Now, let's discuss the given options one by one:
a) Velocity is radial and acceleration is transverse only:
In this option, the velocity is radial which means it is directed towards the center of the circular path. But the acceleration is transverse which means it is perpendicular to the velocity vector. This option is correct because the direction of the acceleration is always towards the center of the circular path in non-uniform circular motion.
b) Velocity is transverse and acceleration is radial only:
In this option, the velocity is transverse which means it is perpendicular to the radius vector. But the acceleration is radial which means it is directed towards the center of the circular path. This option is incorrect because the direction of the acceleration is not always radial in non-uniform circular motion.
c) Velocity is radial and acceleration has both radial and transverse components:
In this option, the velocity is radial which means it is directed towards the center of the circular path. But the acceleration has both radial and transverse components. This option is incorrect because the direction of the acceleration is always towards the center of the circular path in non-uniform circular motion.
d) Velocity is transverse and acceleration has both radial and transverse components:
In this option, the velocity is transverse which means it is perpendicular to the radius vector. But the acceleration has both radial and transverse components. This option is incorrect because the direction of the acceleration is not always radial in non-uniform circular motion.
Hence, the correct option is 'a' - Velocity is radial and acceleration is transverse only.
Non-uniform circular motion is the motion of an object moving in a circular path with a varying speed. The direction of the velocity and acceleration of an object in non-uniform circular motion changes at every point on the circular path.
Velocity:
Velocity is the rate of change of displacement with respect to time. In non-uniform circular motion, the velocity of the object is always tangent to the circular path. The magnitude of the velocity changes at every point on the circular path.
Acceleration:
Acceleration is the rate of change of velocity with respect to time. In non-uniform circular motion, the acceleration of the object is not constant. It changes at every point on the circular path.
Now, let's discuss the given options one by one:
a) Velocity is radial and acceleration is transverse only:
In this option, the velocity is radial which means it is directed towards the center of the circular path. But the acceleration is transverse which means it is perpendicular to the velocity vector. This option is correct because the direction of the acceleration is always towards the center of the circular path in non-uniform circular motion.
b) Velocity is transverse and acceleration is radial only:
In this option, the velocity is transverse which means it is perpendicular to the radius vector. But the acceleration is radial which means it is directed towards the center of the circular path. This option is incorrect because the direction of the acceleration is not always radial in non-uniform circular motion.
c) Velocity is radial and acceleration has both radial and transverse components:
In this option, the velocity is radial which means it is directed towards the center of the circular path. But the acceleration has both radial and transverse components. This option is incorrect because the direction of the acceleration is always towards the center of the circular path in non-uniform circular motion.
d) Velocity is transverse and acceleration has both radial and transverse components:
In this option, the velocity is transverse which means it is perpendicular to the radius vector. But the acceleration has both radial and transverse components. This option is incorrect because the direction of the acceleration is not always radial in non-uniform circular motion.
Hence, the correct option is 'a' - Velocity is radial and acceleration is transverse only.
Where does the development of pollen grains take place?- a) Microsporangia
- b) Megasporangiate cones
- c) Nucellus
- d) Ovules
Correct answer is option 'A'. Can you explain this answer?
Where does the development of pollen grains take place?
a)
Microsporangia
b)
Megasporangiate cones
c)
Nucellus
d)
Ovules
|
Garima Basu answered |
Development of Pollen Grains
The development of pollen grains is a crucial process in the life cycle of seed plants, particularly in the formation of male gametophytes. Let's explore where this development takes place.
Microsporangia
- Pollen grains are produced in structures called microsporangia, which are typically found within the anthers of flowering plants.
- Each microsporangium contains diploid microsporocytes (microspore mother cells) that undergo meiosis to produce haploid microspores.
- These microspores then undergo mitosis to develop into pollen grains, representing the male gametophyte.
Role of Microsporangia
- Microsporangia serve as the site for the entire process of pollen formation, ensuring the production of numerous pollen grains necessary for fertilization.
- The pollen grains are then released from the microsporangia during the process of pollination, allowing for the transfer of male gametes to female reproductive structures.
Other Options Explained
- Megasporangiate cones: These are involved in the development of female gametes and are not the site of pollen grain development.
- Nucellus: This is part of the ovule and plays a role in female gametophyte development, not in pollen formation.
- Ovules: While critical for reproduction, they are sites for the development of female gametophytes and not pollen grains.
In conclusion, the correct answer is option 'A' because pollen grains are specifically developed in the microsporangia, making them essential for male gamete production in plants.
The development of pollen grains is a crucial process in the life cycle of seed plants, particularly in the formation of male gametophytes. Let's explore where this development takes place.
Microsporangia
- Pollen grains are produced in structures called microsporangia, which are typically found within the anthers of flowering plants.
- Each microsporangium contains diploid microsporocytes (microspore mother cells) that undergo meiosis to produce haploid microspores.
- These microspores then undergo mitosis to develop into pollen grains, representing the male gametophyte.
Role of Microsporangia
- Microsporangia serve as the site for the entire process of pollen formation, ensuring the production of numerous pollen grains necessary for fertilization.
- The pollen grains are then released from the microsporangia during the process of pollination, allowing for the transfer of male gametes to female reproductive structures.
Other Options Explained
- Megasporangiate cones: These are involved in the development of female gametes and are not the site of pollen grain development.
- Nucellus: This is part of the ovule and plays a role in female gametophyte development, not in pollen formation.
- Ovules: While critical for reproduction, they are sites for the development of female gametophytes and not pollen grains.
In conclusion, the correct answer is option 'A' because pollen grains are specifically developed in the microsporangia, making them essential for male gamete production in plants.
The leaves of gymnosperms are well-adapted to withstand ‘ extremes of temperature, humidity and wind, because of which of the following features?- a)Needle like leaves
- b)Thick cuticle
- c)Sunken stomata
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
The leaves of gymnosperms are well-adapted to withstand ‘ extremes of temperature, humidity and wind, because of which of the following features?
a)
Needle like leaves
b)
Thick cuticle
c)
Sunken stomata
d)
All of these
|
|
Swati Verma answered |
Conifers have a number of xerophytic characters such as needle -like (e.g., Pinus), scale-like (e.g., Thuja) or small and leathery leaves (e.g., Araucarias), thick cuticle, sclerenchymatous hypodermis and sunken stomata to reduce transpiration. They are, thus, well adapted to tide over the winter period when the soil becomes frozen and availability of water is very little.
What type of roots do some gymnosperms like Pinus have, which are associated with fungal mycorrhiza?
- a)Coralloid roots
- b)Adventitious roots
- c)Tap roots
- d)Aerial roots
Correct answer is option 'C'. Can you explain this answer?
What type of roots do some gymnosperms like Pinus have, which are associated with fungal mycorrhiza?
a)
Coralloid roots
b)
Adventitious roots
c)
Tap roots
d)
Aerial roots
|
Manasa Kumar answered |
Introduction:
Gymnosperms are a group of plants that include conifers such as Pinus. These plants have a unique association with fungal mycorrhiza, which helps in nutrient uptake and enhances their growth. One specific type of root found in gymnosperms, including Pinus, is known as coralloid roots.
Coralloid Roots:
Coralloid roots are specialized roots found in gymnosperms, particularly in some species of conifers. These roots are associated with fungal mycorrhiza, specifically ectomycorrhiza. Ectomycorrhiza is a mutualistic association between the roots of plants and certain fungi, where both partners benefit.
Structure and Function:
Coralloid roots have a distinct structure that differentiates them from other types of roots. They are characterized by a swollen appearance, similar to a coral, hence the name. These swollen regions are called coralloid nodules or clusters.
The coralloid nodules contain specialized fungal structures known as Hartig net, which penetrate the root cells of the gymnosperm host. These fungal structures form a mutualistic symbiotic relationship with the host plant, providing various benefits.
One of the key functions of coralloid roots is nutrient uptake. The fungal mycelium associated with the coralloid roots extends into the surrounding soil, greatly increasing the surface area for nutrient absorption. The fungal hyphae can access nutrients, such as phosphorus, that are typically less available to the plant. In return, the fungus receives organic compounds, such as carbohydrates, from the plant.
Advantages of Mycorrhizal Association:
The association between coralloid roots and fungal mycorrhiza provides several advantages to gymnosperms like Pinus:
1. Increased nutrient uptake: The fungal hyphae enhance the absorption of essential nutrients, especially phosphorus, from the soil. This is particularly beneficial in nutrient-poor environments.
2. Enhanced water absorption: The extensive fungal mycelium increases the surface area for water absorption, helping the plants withstand dry conditions.
3. Disease resistance: The mycorrhizal association can enhance the plant's defense mechanisms against pathogens, providing protection against diseases.
4. Improved soil structure: The presence of mycorrhizal fungi helps in soil aggregation, improving soil structure and stability.
5. Increased tolerance to environmental stress: Gymnosperms with coralloid roots and mycorrhizal association exhibit greater tolerance to environmental stressors such as drought, salinity, and heavy metals.
Conclusion:
In conclusion, some gymnosperms like Pinus have coralloid roots that are associated with fungal mycorrhiza. These specialized roots play a crucial role in nutrient uptake, water absorption, disease resistance, and overall growth and survival of gymnosperms. The mutualistic association between the coralloid roots and fungal mycorrhiza provides various advantages to these plants, enabling them to thrive in different environmental conditions.
Gymnosperms are a group of plants that include conifers such as Pinus. These plants have a unique association with fungal mycorrhiza, which helps in nutrient uptake and enhances their growth. One specific type of root found in gymnosperms, including Pinus, is known as coralloid roots.
Coralloid Roots:
Coralloid roots are specialized roots found in gymnosperms, particularly in some species of conifers. These roots are associated with fungal mycorrhiza, specifically ectomycorrhiza. Ectomycorrhiza is a mutualistic association between the roots of plants and certain fungi, where both partners benefit.
Structure and Function:
Coralloid roots have a distinct structure that differentiates them from other types of roots. They are characterized by a swollen appearance, similar to a coral, hence the name. These swollen regions are called coralloid nodules or clusters.
The coralloid nodules contain specialized fungal structures known as Hartig net, which penetrate the root cells of the gymnosperm host. These fungal structures form a mutualistic symbiotic relationship with the host plant, providing various benefits.
One of the key functions of coralloid roots is nutrient uptake. The fungal mycelium associated with the coralloid roots extends into the surrounding soil, greatly increasing the surface area for nutrient absorption. The fungal hyphae can access nutrients, such as phosphorus, that are typically less available to the plant. In return, the fungus receives organic compounds, such as carbohydrates, from the plant.
Advantages of Mycorrhizal Association:
The association between coralloid roots and fungal mycorrhiza provides several advantages to gymnosperms like Pinus:
1. Increased nutrient uptake: The fungal hyphae enhance the absorption of essential nutrients, especially phosphorus, from the soil. This is particularly beneficial in nutrient-poor environments.
2. Enhanced water absorption: The extensive fungal mycelium increases the surface area for water absorption, helping the plants withstand dry conditions.
3. Disease resistance: The mycorrhizal association can enhance the plant's defense mechanisms against pathogens, providing protection against diseases.
4. Improved soil structure: The presence of mycorrhizal fungi helps in soil aggregation, improving soil structure and stability.
5. Increased tolerance to environmental stress: Gymnosperms with coralloid roots and mycorrhizal association exhibit greater tolerance to environmental stressors such as drought, salinity, and heavy metals.
Conclusion:
In conclusion, some gymnosperms like Pinus have coralloid roots that are associated with fungal mycorrhiza. These specialized roots play a crucial role in nutrient uptake, water absorption, disease resistance, and overall growth and survival of gymnosperms. The mutualistic association between the coralloid roots and fungal mycorrhiza provides various advantages to these plants, enabling them to thrive in different environmental conditions.
Which of the following represents the correct sequence of events during fertilization and seed formation in gymnosperms?A.The pollen tube carrying the male gametes grows towards archegonia in the ovules
B. Pollen grains are released from the microsporangium.
C..FertilisationD. Zygote develops into an embryo.Ovules develop into seeds- a)C→A→B→D
- b)B→A→C→D
- c)D→C→A→B
- d)C→D→B→A
Correct answer is option 'B'. Can you explain this answer?
Which of the following represents the correct sequence of events during fertilization and seed formation in gymnosperms?
A.The pollen tube carrying the male gametes grows towards archegonia in the ovules
B. Pollen grains are released from the microsporangium.
C..Fertilisation
B. Pollen grains are released from the microsporangium.
C..Fertilisation
D. Zygote develops into an embryo.Ovules develop into seeds
a)
C→A→B→D
b)
B→A→C→D
c)
D→C→A→B
d)
C→D→B→A
|
Avik Patel answered |
Sequence of Events in Gymnosperms Fertilization and Seed Formation
The correct sequence of events during fertilization and seed formation in gymnosperms is crucial to understanding their reproductive cycle. Here’s a breakdown of the steps involved:
1. Pollen Grain Release
- Pollen grains are produced in the microsporangium (the male reproductive structure).
- These grains are then released into the environment, often carried by wind.
2. Pollen Tube Growth
- Once a pollen grain lands on a receptive female cone, it germinates and forms a pollen tube.
- This tube grows towards the archegonia (female reproductive structure) located in the ovules.
3. Fertilization
- The male gametes travel down the pollen tube to reach the egg cell in the archegonia.
- Fertilization occurs when one of the male gametes fuses with the egg cell, resulting in the formation of a zygote.
4. Embryo Development
- The zygote then develops into an embryo, which is the early stage of a new plant.
5. Seed Formation
- Finally, the fertilized ovule develops into a seed, encapsulating the embryo and providing it with nourishment.
Conclusion
In summary, the correct sequence is:
- B (Pollen grains are released from the microsporangium)
- A (The pollen tube carrying the male gametes grows towards archegonia in the ovules)
- C (Fertilization)
- D (Zygote develops into an embryo, and ovules develop into seeds).
This sequence emphasizes the essential steps from pollen release to seed development in gymnosperms, confirming that option B is indeed the correct answer.
The correct sequence of events during fertilization and seed formation in gymnosperms is crucial to understanding their reproductive cycle. Here’s a breakdown of the steps involved:
1. Pollen Grain Release
- Pollen grains are produced in the microsporangium (the male reproductive structure).
- These grains are then released into the environment, often carried by wind.
2. Pollen Tube Growth
- Once a pollen grain lands on a receptive female cone, it germinates and forms a pollen tube.
- This tube grows towards the archegonia (female reproductive structure) located in the ovules.
3. Fertilization
- The male gametes travel down the pollen tube to reach the egg cell in the archegonia.
- Fertilization occurs when one of the male gametes fuses with the egg cell, resulting in the formation of a zygote.
4. Embryo Development
- The zygote then develops into an embryo, which is the early stage of a new plant.
5. Seed Formation
- Finally, the fertilized ovule develops into a seed, encapsulating the embryo and providing it with nourishment.
Conclusion
In summary, the correct sequence is:
- B (Pollen grains are released from the microsporangium)
- A (The pollen tube carrying the male gametes grows towards archegonia in the ovules)
- C (Fertilization)
- D (Zygote develops into an embryo, and ovules develop into seeds).
This sequence emphasizes the essential steps from pollen release to seed development in gymnosperms, confirming that option B is indeed the correct answer.
Which of the following gymnosperms has branched stems?- a)Pinus
- b)Cycas
- c)Cedrus
- d)Both (a) and (c)
Correct answer is option 'D'. Can you explain this answer?
Which of the following gymnosperms has branched stems?
a)
Pinus
b)
Cycas
c)
Cedrus
d)
Both (a) and (c)
|
|
Anisha Datta answered |
Introduction:
Gymnosperms are a group of seed-producing plants that do not have flowers or fruits. They are characterized by their naked seeds, which are not enclosed in an ovary. Gymnosperms include four major groups: cycads, ginkgoes, gnetophytes, and conifers.
Branched stems in gymnosperms:
Among the gymnosperms, the two genera that have branched stems are Pinus (pines) and Cedrus (cedars).
Pinus (pines):
Pines are a group of coniferous trees that belong to the genus Pinus. They are widely distributed throughout the Northern Hemisphere and are known for their needle-like leaves and woody cones. Pines have branched stems that give rise to multiple branches, forming a bushy or conical shape. The branches of pines are covered with needle-like leaves that are arranged in clusters. The branched stems of pines provide support for the leaves and cones, and also serve as a site for the attachment of the reproductive structures.
Cedrus (cedars):
Cedars are another group of gymnosperms that have branched stems. The genus Cedrus includes several species of evergreen coniferous trees, native to the mountains of the Mediterranean region and western Himalayas. Cedars have a distinctive branching pattern, with branches that spread horizontally and form a broad, pyramidal crown. The branches of cedars bear needle-like leaves that are arranged in spirals along the branches. The branched stems of cedars provide structural support and contribute to the overall shape and appearance of the tree.
Conclusion:
In conclusion, among the given options, both Pinus (pines) and Cedrus (cedars) are gymnosperms that have branched stems. Pines are characterized by their bushy or conical shape, with multiple branches arising from the main stem. Cedars, on the other hand, have a broad, pyramidal crown with horizontally spreading branches. The branched stems of both pines and cedars provide support for the leaves and cones, and contribute to the overall structure and appearance of these gymnosperms.
Gymnosperms are a group of seed-producing plants that do not have flowers or fruits. They are characterized by their naked seeds, which are not enclosed in an ovary. Gymnosperms include four major groups: cycads, ginkgoes, gnetophytes, and conifers.
Branched stems in gymnosperms:
Among the gymnosperms, the two genera that have branched stems are Pinus (pines) and Cedrus (cedars).
Pinus (pines):
Pines are a group of coniferous trees that belong to the genus Pinus. They are widely distributed throughout the Northern Hemisphere and are known for their needle-like leaves and woody cones. Pines have branched stems that give rise to multiple branches, forming a bushy or conical shape. The branches of pines are covered with needle-like leaves that are arranged in clusters. The branched stems of pines provide support for the leaves and cones, and also serve as a site for the attachment of the reproductive structures.
Cedrus (cedars):
Cedars are another group of gymnosperms that have branched stems. The genus Cedrus includes several species of evergreen coniferous trees, native to the mountains of the Mediterranean region and western Himalayas. Cedars have a distinctive branching pattern, with branches that spread horizontally and form a broad, pyramidal crown. The branches of cedars bear needle-like leaves that are arranged in spirals along the branches. The branched stems of cedars provide structural support and contribute to the overall shape and appearance of the tree.
Conclusion:
In conclusion, among the given options, both Pinus (pines) and Cedrus (cedars) are gymnosperms that have branched stems. Pines are characterized by their bushy or conical shape, with multiple branches arising from the main stem. Cedars, on the other hand, have a broad, pyramidal crown with horizontally spreading branches. The branched stems of both pines and cedars provide support for the leaves and cones, and contribute to the overall structure and appearance of these gymnosperms.
Select the correct pattern of arrangement of reproductive structures for gymnosperms.- a)Spores → Sporophylls → Sporangia → Strobili
- b)Spores → Sporangia → Sporophylls → Strobili
- c)Sporangia → Sporophylls → Spores → Strobili
- d)Spores → Sporangia → Strobili → Sporophylls
Correct answer is option 'B'. Can you explain this answer?
Select the correct pattern of arrangement of reproductive structures for gymnosperms.
a)
Spores → Sporophylls → Sporangia → Strobili
b)
Spores → Sporangia → Sporophylls → Strobili
c)
Sporangia → Sporophylls → Spores → Strobili
d)
Spores → Sporangia → Strobili → Sporophylls
|
|
Swati Iyer answered |
B)Flowers
A particles revolves along a circle with a uniform speed. The motion of the particle is ____ .- a)one dimensional
- b)two dimensional.
- c)translatory
- d)oscillatory
Correct answer is option 'B'. Can you explain this answer?
A particles revolves along a circle with a uniform speed. The motion of the particle is ____ .
a)
one dimensional
b)
two dimensional.
c)
translatory
d)
oscillatory
|
Anirban Shah answered |
Motion of a Particle Revolving Along a Circle
When a particle revolves along a circle with a uniform speed, the motion of the particle is considered to be two-dimensional.
Explanation:
One-dimensional Motion:
One-dimensional motion refers to the motion of an object along a straight line. In this type of motion, the object can only move forward or backward. The position of the object is described by a single coordinate, usually denoted as x.
Two-dimensional Motion:
Two-dimensional motion refers to the motion of an object in a plane. In this type of motion, the object can move in any direction within the plane. The position of the object is described by two coordinates, usually denoted as (x, y) or (r, θ) in polar coordinates.
Particle Revolving Along a Circle:
When a particle revolves along a circle, it moves in a curved path. The motion of the particle can be described in terms of its position along the circumference of the circle.
Uniform Speed:
When the particle moves with a uniform speed, it covers equal distances in equal intervals of time. This means that the particle takes the same amount of time to travel from one point to another along the circumference of the circle.
Motion of the Particle:
The motion of the particle revolving along a circle with a uniform speed is two-dimensional for the following reasons:
1. The particle moves along the circumference of the circle, which is a curved path in a plane.
2. The position of the particle can be described using two coordinates - the radius of the circle (r) and the angle (θ) it makes with a reference line.
Conclusion:
Hence, the correct answer is option 'B' - the motion of the particle is two-dimensional when it revolves along a circle with a uniform speed.
When a particle revolves along a circle with a uniform speed, the motion of the particle is considered to be two-dimensional.
Explanation:
One-dimensional Motion:
One-dimensional motion refers to the motion of an object along a straight line. In this type of motion, the object can only move forward or backward. The position of the object is described by a single coordinate, usually denoted as x.
Two-dimensional Motion:
Two-dimensional motion refers to the motion of an object in a plane. In this type of motion, the object can move in any direction within the plane. The position of the object is described by two coordinates, usually denoted as (x, y) or (r, θ) in polar coordinates.
Particle Revolving Along a Circle:
When a particle revolves along a circle, it moves in a curved path. The motion of the particle can be described in terms of its position along the circumference of the circle.
Uniform Speed:
When the particle moves with a uniform speed, it covers equal distances in equal intervals of time. This means that the particle takes the same amount of time to travel from one point to another along the circumference of the circle.
Motion of the Particle:
The motion of the particle revolving along a circle with a uniform speed is two-dimensional for the following reasons:
1. The particle moves along the circumference of the circle, which is a curved path in a plane.
2. The position of the particle can be described using two coordinates - the radius of the circle (r) and the angle (θ) it makes with a reference line.
Conclusion:
Hence, the correct answer is option 'B' - the motion of the particle is two-dimensional when it revolves along a circle with a uniform speed.
The second and third period of the modern periodic table contains how many elements in all?- a)8
- b)32
- c)18
- d)2
Correct answer is option 'A'. Can you explain this answer?
The second and third period of the modern periodic table contains how many elements in all?
a)
8
b)
32
c)
18
d)
2
|
|
Ciel Knowledge answered |
- Second and third period of the modern periodic table contains 8 elements.
Plants which posseses seeds but not fruits are- a)bryophytes
- b)pteridophytes
- c)gymnosperms
- d)angiosperms
Correct answer is option 'C'. Can you explain this answer?
Plants which posseses seeds but not fruits are
a)
bryophytes
b)
pteridophytes
c)
gymnosperms
d)
angiosperms
|
|
Riya Banerjee answered |
Gymnosperms are those seed plants in which the seeds remain exposed over the surface of the megasporophylls because the latter are not folded to form pistils and thus lack ovary. Flowers are absent and thus fruits are not formed.
In a uniform circular motion - - a)Both velocity and acceleration are constant.
- b)Both speed and velocity constant
- c)Both Acceleration and speed changes
- d)Both acceleration and velocity changes
Correct answer is option 'D'. Can you explain this answer?
In a uniform circular motion -
a)
Both velocity and acceleration are constant.
b)
Both speed and velocity constant
c)
Both Acceleration and speed changes
d)
Both acceleration and velocity changes
|
Stepway Academy answered |
CONCEPT:
- Uniform motion is the type of motion where a moving object traces equal distances in equal intervals of time.
- Since the distance and time intervals are the same, speed is constant in uniform motion.
- Uniform circular motion is where a moving object traces a circular path with constant speed.
- A circle is assumed to be a polygon with infinitely many sides such that each side approximates to a point.
- So, if the object moving on a circular path undergoes a change in direction at every point.
- Since direction changes and speed remains constant, velocity is varying.
EXPLANATION:
- Velocity is changing in a uniform circular motion as the direction of the object keeps changing at every point.
- Acceleration is the rate of change of velocity. Since velocity keeps changing at every instant, acceleration also changes.
Therefore, both acceleration and velocity changes in a uniform circular motion.
Uniform circular motion is called continuously accelerated motion mainly because- a)direction of motion changes
- b)speed remains the same
- c)velocity remains the same
- d)direction of motion does not change
Correct answer is option 'A'. Can you explain this answer?
Uniform circular motion is called continuously accelerated motion mainly because
a)
direction of motion changes
b)
speed remains the same
c)
velocity remains the same
d)
direction of motion does not change
|
|
Anoushka Basu answered |
**Uniform Circular Motion**
Uniform circular motion refers to the motion of an object traveling in a circular path at a constant speed. In this type of motion, the object moves along the circumference of the circle, maintaining a fixed distance from the center.
**Acceleration in Uniform Circular Motion**
While the speed of the object remains constant in uniform circular motion, it is important to note that the object is still experiencing acceleration. This may seem counterintuitive since we typically associate acceleration with a change in speed. However, in uniform circular motion, the acceleration is directed towards the center of the circle and is known as centripetal acceleration.
**Direction of Motion Changes**
The correct answer to why uniform circular motion is called continuously accelerated motion is that the direction of motion changes. In uniform circular motion, an object continuously changes its direction as it moves along the circular path. This change in direction implies that the object is experiencing acceleration.
**Velocity Remains the Same**
While the object is undergoing acceleration in uniform circular motion, its velocity remains constant. Velocity is a vector quantity that includes both magnitude (speed) and direction. In uniform circular motion, the speed of the object remains constant, but its direction changes. Therefore, the velocity of the object remains the same in terms of magnitude, but the direction of the velocity vector continually changes.
**Centripetal Acceleration**
The centripetal acceleration is the acceleration experienced by an object undergoing uniform circular motion. It is directed towards the center of the circle and is responsible for continuously changing the direction of the object's motion. The magnitude of the centripetal acceleration can be calculated using the formula:
a = v^2 / r
where a is the centripetal acceleration, v is the velocity of the object, and r is the radius of the circular path.
**Conclusion**
In conclusion, uniform circular motion is called continuously accelerated motion because the direction of motion of the object undergoing circular motion continually changes. Although the speed (magnitude of velocity) remains constant, the object experiences centripetal acceleration directed towards the center of the circle. This acceleration is responsible for continuously changing the direction of the object's motion, making it an example of accelerated motion.
Uniform circular motion refers to the motion of an object traveling in a circular path at a constant speed. In this type of motion, the object moves along the circumference of the circle, maintaining a fixed distance from the center.
**Acceleration in Uniform Circular Motion**
While the speed of the object remains constant in uniform circular motion, it is important to note that the object is still experiencing acceleration. This may seem counterintuitive since we typically associate acceleration with a change in speed. However, in uniform circular motion, the acceleration is directed towards the center of the circle and is known as centripetal acceleration.
**Direction of Motion Changes**
The correct answer to why uniform circular motion is called continuously accelerated motion is that the direction of motion changes. In uniform circular motion, an object continuously changes its direction as it moves along the circular path. This change in direction implies that the object is experiencing acceleration.
**Velocity Remains the Same**
While the object is undergoing acceleration in uniform circular motion, its velocity remains constant. Velocity is a vector quantity that includes both magnitude (speed) and direction. In uniform circular motion, the speed of the object remains constant, but its direction changes. Therefore, the velocity of the object remains the same in terms of magnitude, but the direction of the velocity vector continually changes.
**Centripetal Acceleration**
The centripetal acceleration is the acceleration experienced by an object undergoing uniform circular motion. It is directed towards the center of the circle and is responsible for continuously changing the direction of the object's motion. The magnitude of the centripetal acceleration can be calculated using the formula:
a = v^2 / r
where a is the centripetal acceleration, v is the velocity of the object, and r is the radius of the circular path.
**Conclusion**
In conclusion, uniform circular motion is called continuously accelerated motion because the direction of motion of the object undergoing circular motion continually changes. Although the speed (magnitude of velocity) remains constant, the object experiences centripetal acceleration directed towards the center of the circle. This acceleration is responsible for continuously changing the direction of the object's motion, making it an example of accelerated motion.
In which one of the following, the male and female gametophytes don't have free-living independent existence?- a) Pteris
- b)Funaria
- c) Polytrichum
- d)Cedrus
Correct answer is option 'D'. Can you explain this answer?
In which one of the following, the male and female gametophytes don't have free-living independent existence?
a)
Pteris
b)
Funaria
c)
Polytrichum
d)
Cedrus
|
|
Bs Academy answered |
The correct answer is:
Option 4: Cedrus
Explanation: In Cedrus (a gymnosperm), the male and female gametophytes do not have a free-living independent existence. Instead, they are dependent on the sporophyte for nourishment and protection. In contrast, in Pteris (a fern), Funaria (a moss), and Polytrichum (another moss), the gametophytes are free-living and independent.
A particle is acted upon by a force of constant magnitude. Which is always perpendicular to the velocity of the particle ? The motion of the particle takes place in a plane. It follow that that- a)its velocity is constant
- b)its acceleration is constant
- c)its kinetic energy is constant
- d)it moves in a circular path
Correct answer is option 'C,D'. Can you explain this answer?
A particle is acted upon by a force of constant magnitude. Which is always perpendicular to the velocity of the particle ? The motion of the particle takes place in a plane. It follow that that
a)
its velocity is constant
b)
its acceleration is constant
c)
its kinetic energy is constant
d)
it moves in a circular path
|
|
Shail Majumdar answered |
Perpendicular Force on a Particle in a Plane
When a particle is acted upon by a force of constant magnitude that is always perpendicular to its velocity, the following can be observed:
Circular Motion
The particle moves in a circular path because the force acts as a centripetal force, pulling the particle towards the center of the circle.
Constant Kinetic Energy
Since the force is always perpendicular to the velocity of the particle, it does not do any work on the particle. Therefore, the kinetic energy of the particle remains constant.
Variable Speed
Although the particle moves in a circular path, its speed is not constant. This is because the force only changes the direction of the particle, not its speed. Therefore, the particle will move faster when it is farther away from the center of the circle and slower when it is closer to the center.
Conclusion
In conclusion, when a particle is acted upon by a force of constant magnitude that is always perpendicular to its velocity, it will move in a circular path with variable speed while maintaining constant kinetic energy.
When a particle is acted upon by a force of constant magnitude that is always perpendicular to its velocity, the following can be observed:
Circular Motion
The particle moves in a circular path because the force acts as a centripetal force, pulling the particle towards the center of the circle.
Constant Kinetic Energy
Since the force is always perpendicular to the velocity of the particle, it does not do any work on the particle. Therefore, the kinetic energy of the particle remains constant.
Variable Speed
Although the particle moves in a circular path, its speed is not constant. This is because the force only changes the direction of the particle, not its speed. Therefore, the particle will move faster when it is farther away from the center of the circle and slower when it is closer to the center.
Conclusion
In conclusion, when a particle is acted upon by a force of constant magnitude that is always perpendicular to its velocity, it will move in a circular path with variable speed while maintaining constant kinetic energy.
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