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All questions of Plant Kingdom for BPSC (Bihar) Exam
Which of the following tissues has dead cells?- a) Parenchyma
- b) Sclerenchyma
- c) Collenchyma
- d) Epithelial tissue
Correct answer is option 'B'. Can you explain this answer?
Which of the following tissues has dead cells?
a)
Parenchyma
b)
Sclerenchyma
c)
Collenchyma
d)
Epithelial tissue
|
Nandita Saha answered |
Sclerenchyma → cells are the permanent tissues present in the plants. They provide hardness and stiffness to the plant and are composed of dead cells.
From which of the following part of a plant opium is obtained?- a)Dried leaves
- b)Dried latex
- c)Roots
- d)Stem bark
Correct answer is option 'B'. Can you explain this answer?
From which of the following part of a plant opium is obtained?
a)
Dried leaves
b)
Dried latex
c)
Roots
d)
Stem bark
|
Nishanth Jain answered |
Opium is the dried latex obtained from the opium poppy
Various functions like photosynthesis, storage, excretion performed by _________.- a) Sclerenchyma
- b) parenchyma
- c) Collenchyma
- d) Aerenchyma
Correct answer is option 'B'. Can you explain this answer?
Various functions like photosynthesis, storage, excretion performed by _________.
a)
Sclerenchyma
b)
parenchyma
c)
Collenchyma
d)
Aerenchyma
|
|
Dhruba Saini answered |
Parenchyma forms the bulk of plant ground tissue, where they may be specialised to function in photosynthesis, storage, or transport.
Cavity or lumen is narrow in- a) Sclerenchyma
- b) Parenchyma
- c) Collenchyma
- d) Tracheids
Correct answer is option 'A'. Can you explain this answer?
Cavity or lumen is narrow in
a)
Sclerenchyma
b)
Parenchyma
c)
Collenchyma
d)
Tracheids
|
|
Dipika Gupta answered |
Lumen are cavities present inside the cell,cells of sclerenchyma tissue have narrow lumen because sclerenchyma are strongly lignified which lead to compressing the cell and thus only narrow cavity is left
Meristematic tissues are found in- a) only stems of the plants
- b)both roots and stems
- c)in all growing tips of the plant body
- d)only roots of the plants
Correct answer is option 'C'. Can you explain this answer?
Meristematic tissues are found in
a)
only stems of the plants
b)
both roots and stems
c)
in all growing tips of the plant body
d)
only roots of the plants
|
|
Debanshi Sarkar answered |
A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of a plant and are responsible for growth
- a)A-2; B-1; C-3; D- 4
- b) A-4; B-1; C-3; D-2
- c) A-2; B-3; C-1; D-4
- d) A-4; B-3; C-1; D-2
Correct answer is option 'B'. Can you explain this answer?
a)
A-2; B-1; C-3; D- 4
b)
A-4; B-1; C-3; D-2
c)
A-2; B-3; C-1; D-4
d)
A-4; B-3; C-1; D-2
|
|
Sharad Chavan answered |
1. fruits is made up of ovary
2. seed is made up of ovule
3. wood is made up of stem
4. starch is present in leaf
so the correct answer is B.
2. seed is made up of ovule
3. wood is made up of stem
4. starch is present in leaf
so the correct answer is B.
Main function of lenticel is- a) transpiration
- b) guttation
- c) gaseous exchange
- d) both [a] & [c]
Correct answer is option 'C'. Can you explain this answer?
Main function of lenticel is
a)
transpiration
b)
guttation
c)
gaseous exchange
d)
both [a] & [c]
|
|
Shreya Desai answered |
The lenticels functions as a pore, providing a pathway for the direct exchange of gasesbetween the internal tissues and atmosphere through the bark, which is otherwise impermeable to gases.The lenticels help in the gaseous exchange between the atmosphere and the internal tissue of the stem. The lenticels also helps in transpiration called as the lenticular transpiration.Lenticels are a portions of periderm with numerous intercellular spaces and loosely organized cells
A plant belonging to which of the following groups would show least adaptation to marine water?- a)Pteridophytes
- b)Gymnosperms
- c)Angiosperms
- d)Bryophytes
Correct answer is option 'C'. Can you explain this answer?
A plant belonging to which of the following groups would show least adaptation to marine water?
a)
Pteridophytes
b)
Gymnosperms
c)
Angiosperms
d)
Bryophytes
|
Rhea Reddy answered |
The correct option is C.
A plant belonging to the angiosperms group would show least adaptation to marine water. Angiosperms are vascular plants that have stems, roots, and leaves.
A plant belonging to the angiosperms group would show least adaptation to marine water. Angiosperms are vascular plants that have stems, roots, and leaves.
Nucleated part of nerve cell is called- a) axon
- b) dendrites
- c) cyton
- d) None of the above
Correct answer is option 'C'. Can you explain this answer?
Nucleated part of nerve cell is called
a)
axon
b)
dendrites
c)
cyton
d)
None of the above
|
|
Surbhi Basu answered |
Axon is the long, thin hair like part arising from the cell body of the neuron.
Dendrites are short, branched parts arising from cell body or cyton. Dendrites are many in number.
Cyton is a part of neuron containing the nucleus. It is also called cell body. Therefore, option C is correct.
Dendrites are short, branched parts arising from cell body or cyton. Dendrites are many in number.
Cyton is a part of neuron containing the nucleus. It is also called cell body. Therefore, option C is correct.
Which tissue does lack blood supply and heals slowly?- a) nervous
- b) muscle
- c) cartilage
- d) bone
Correct answer is option 'C'. Can you explain this answer?
Which tissue does lack blood supply and heals slowly?
a)
nervous
b)
muscle
c)
cartilage
d)
bone
|
|
Debanshi Sarkar answered |
Cartilage heals slowly because it has no blood supply
Presence of vessel in the wood is- a)A primitive character
- b)An advanced character
- c)A vestigeal character
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
Presence of vessel in the wood is
a)
A primitive character
b)
An advanced character
c)
A vestigeal character
d)
None of the above
|
|
Nandita Saha answered |
Vessels are usually present in angiosperms while in other lower plants they are not present.
Which plant kingdom can survive both on land and in water?- a)Tracheophyta
- b)Pteridophyta
- c)Thallophyta
- d)Bryophyta
Correct answer is option 'D'. Can you explain this answer?
Which plant kingdom can survive both on land and in water?
a)
Tracheophyta
b)
Pteridophyta
c)
Thallophyta
d)
Bryophyta
|
|
Nidhi Pillai answered |
The sperm of bryophyte (antherozoids) are flagellate and need water to swim to the eggs. In other words, as these plants need water for reproduction unlike other plants, they are called as amphibians. Amphibians are those organisms which live on both land and in water.
The equilibrium constant in a reversible chemical reaction at a given temperature- a)depends on the initial concentration of the reactants
- b)depends on the concentration of one of the products at equilibrium
- c)does not depend on the initial concentrations of reactants
- d)is not characteristic of the reaction
Correct answer is option 'C'. Can you explain this answer?
The equilibrium constant in a reversible chemical reaction at a given temperature
a)
depends on the initial concentration of the reactants
b)
depends on the concentration of one of the products at equilibrium
c)
does not depend on the initial concentrations of reactants
d)
is not characteristic of the reaction
|
Swati Khanna answered |
The correct option is C.
The equilibrium constant in a reversible reaction at a given temperature. Solution : Equilibrium constant is independent of original concentration of reactant.
The equilibrium constant in a reversible reaction at a given temperature. Solution : Equilibrium constant is independent of original concentration of reactant.
Cloves, used as a spice, are derived from which of the following plant parts? - a) Seeds
- b) Fruits
- c) Flower buds
- d) Young leaves
Correct answer is option 'C'. Can you explain this answer?
Cloves, used as a spice, are derived from which of the following plant parts?
a)
Seeds
b)
Fruits
c)
Flower buds
d)
Young leaves
|
|
Janhavi Bajaj answered |
Cloves are the rich, brown, dried, unopened flower buds of Syzygium aromaticum, an evergreen tree in the myrtle family. The name comes from the French "clou" meaning nail. Cloves come from Madagascar, Indonesia and Sri Lanka. Cloves are used in spice cookies and cakes.
Total number of ATP consume during Kreb's cycle is- a) 0
- b) 1
- c) 2
- d) 3
Correct answer is option 'C'. Can you explain this answer?
Total number of ATP consume during Kreb's cycle is
a)
0
b)
1
c)
2
d)
3
|
|
Saranya Basak answered |
The Krebs cycle produces two molecules of ATP for every molecule of glucose. The Krebs cycle also produces eight molecules of NADH and two molecules of FADH2 per molecule of glucose.
The most stable measure of central tendency is- a)mean
- b)median
- c)mode
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
The most stable measure of central tendency is
a)
mean
b)
median
c)
mode
d)
none of these
|
Naina Bansal answered |
Range is not a measure of central tendency at all. It is an absolute measure of Dispersion that is explained by the difference between the maximum and the minimum values in a series. Now, a comparison between the stability amongst Mean, Median and Mode depends on the nature of the distribution that you're working with. Let's say your data has a lot of outliers, in such a case mean will not serve the purpose well as a measure of CT, Median would be more appropriate. Remember that Mean is affected by extreme values while Median is not. Mode is more appropriate when you're more concerned about the frequency of occurences. For example if you wanted to know what size of shoes should a shoe seller keep more in stock compared to the other sizes.
Which one of the following plant nutrients is not supplemented in the soil for growing legumes?- a)Nitrogen
- b)Potassium
- c)Phosphorus
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Which one of the following plant nutrients is not supplemented in the soil for growing legumes?
a)
Nitrogen
b)
Potassium
c)
Phosphorus
d)
None of these
|
|
Avantika Mukherjee answered |
- Growing legume cover crops is one of the most important tools for increasing soil fertility in an organic garden.
- The bacteria take gaseous nitrogen from the air in the soil and feed this nitrogen to the legumes; in exchange the plant provides carbohydrates to the bacteria.
- The bacteria take gaseous nitrogen from the air in the soil and feed this nitrogen to the legumes; in exchange the plant provides carbohydrates to the bacteria.
The phenomenon in which seeds germinate and seedlings grow while still attached to their mother plant before dropping down to establish themselves or be transported elsewhere, is most commonly found in which among the following plants?- a)Allium cepa
- b)Rhizophora
- c)Solanum tuberosum
- d)Solanum melongena
Correct answer is option 'B'. Can you explain this answer?
The phenomenon in which seeds germinate and seedlings grow while still attached to their mother plant before dropping down to establish themselves or be transported elsewhere, is most commonly found in which among the following plants?
a)
Allium cepa
b)
Rhizophora
c)
Solanum tuberosum
d)
Solanum melongena
|
|
Samarth Gupta answered |
Allium cepa is onion. Solanum tuberosum is potato, Solanum melongena is Brinjal. The phenomenon given in this question is shown by Mangrove Plants and is known as Vivipary and Rhizophora belongs to that category.
Root hairs develop from- a) region of maturation
- b) region of elongation
- c) region of meristematic activity
- d) root cap
Correct answer is option 'A'. Can you explain this answer?
Root hairs develop from
a)
region of maturation
b)
region of elongation
c)
region of meristematic activity
d)
root cap
|
|
Gargi Saha answered |
Root hairs develop from the region of maturation or the region of differentiation.
The dead element present in the phloem is- a) companion cells
- b) phloem fibres
- c) phloem parenchyma
- d) sieve tube
Correct answer is option 'B'. Can you explain this answer?
The dead element present in the phloem is
a)
companion cells
b)
phloem fibres
c)
phloem parenchyma
d)
sieve tube
|
|
Athul Saini answered |
Phloem fibres are thick walled, elongated spindle shaped dead cells which possess narrow lumen. They provides mechanical support to the tissue. Phloem parenchyma are thin walled-living cells of parenchyma. They have two functions, storage and lateral food conduction
Isopropyl chloride undergoes hydrolysis by- a)SN1 mechanism
- b)SN2 mechanism
- c)SN1 and SN2 mechanism
- d)Neither SN1 nor SN2 mechanism
Correct answer is option 'C'. Can you explain this answer?
Isopropyl chloride undergoes hydrolysis by
a)
SN1 mechanism
b)
SN2 mechanism
c)
SN1 and SN2 mechanism
d)
Neither SN1 nor SN2 mechanism
|
Sreemoyee Gupta answered |
Secondary, primary allylic and primary benzylic halides may react predominantly either by SN1 or SN2 mechanism or by both the mechanisms without much preference, depending upon the nature of the nuclephile and the solvent.
The Indian Pipe Plant or Monotrapa can be best placed in which among the following groups?- a)Parasite
- b)Saprophyte
- c) Insectivorous
- d)Lithophyte
Correct answer is option 'B'. Can you explain this answer?
The Indian Pipe Plant or Monotrapa can be best placed in which among the following groups?
a)
Parasite
b)
Saprophyte
c)
Insectivorous
d)
Lithophyte
|
|
Simran Menon answered |
The Indian Pipe Plant or Monotropa
The Indian Pipe Plant, also known as Monotropa, belongs to the group of saprophytes. Saprophytes are plants that obtain their nutrients by decomposing dead organic matter. Let's understand why Monotropa is classified as a saprophyte.
Saprophytes
Saprophytes are unique plants that do not have chlorophyll and therefore cannot perform photosynthesis. Instead, they rely on obtaining nutrients from decaying organic matter, such as dead plants, animal remains, or fecal matter. These plants play a crucial role in the ecosystem by breaking down organic material and recycling nutrients.
Characteristics of Monotropa
Monotropa, commonly known as the Indian Pipe Plant, is a fascinating parasitic plant that belongs to the saprophyte group. Some key characteristics of Monotropa are as follows:
1. Lack of chlorophyll: Monotropa does not possess chlorophyll, which is responsible for the green color in plants. This absence of chlorophyll makes it unable to carry out photosynthesis and produce its own food.
2. Dependence on mycorrhizal fungi: Monotropa forms a symbiotic relationship with mycorrhizal fungi. These fungi are present in the soil and help in absorbing nutrients from decaying organic matter. The fungi provide essential nutrients to Monotropa, while the plant provides carbohydrates to the fungi.
3. White or pale coloration: Due to the absence of chlorophyll, Monotropa appears pale or white in color. It has a waxy texture, giving it a ghostly appearance.
4. Habitat and distribution: Monotropa is commonly found in moist, shady areas of forests. It grows on the forest floor, often in association with certain tree species. It is found in various regions of the world, including North America, Europe, and Asia.
Conclusion
In conclusion, the Indian Pipe Plant or Monotropa is classified as a saprophyte. It lacks chlorophyll and relies on mycorrhizal fungi to obtain nutrients from decaying organic matter. Understanding the classification of plants helps us appreciate the diversity of the plant kingdom and their unique adaptations for survival.
The Indian Pipe Plant, also known as Monotropa, belongs to the group of saprophytes. Saprophytes are plants that obtain their nutrients by decomposing dead organic matter. Let's understand why Monotropa is classified as a saprophyte.
Saprophytes
Saprophytes are unique plants that do not have chlorophyll and therefore cannot perform photosynthesis. Instead, they rely on obtaining nutrients from decaying organic matter, such as dead plants, animal remains, or fecal matter. These plants play a crucial role in the ecosystem by breaking down organic material and recycling nutrients.
Characteristics of Monotropa
Monotropa, commonly known as the Indian Pipe Plant, is a fascinating parasitic plant that belongs to the saprophyte group. Some key characteristics of Monotropa are as follows:
1. Lack of chlorophyll: Monotropa does not possess chlorophyll, which is responsible for the green color in plants. This absence of chlorophyll makes it unable to carry out photosynthesis and produce its own food.
2. Dependence on mycorrhizal fungi: Monotropa forms a symbiotic relationship with mycorrhizal fungi. These fungi are present in the soil and help in absorbing nutrients from decaying organic matter. The fungi provide essential nutrients to Monotropa, while the plant provides carbohydrates to the fungi.
3. White or pale coloration: Due to the absence of chlorophyll, Monotropa appears pale or white in color. It has a waxy texture, giving it a ghostly appearance.
4. Habitat and distribution: Monotropa is commonly found in moist, shady areas of forests. It grows on the forest floor, often in association with certain tree species. It is found in various regions of the world, including North America, Europe, and Asia.
Conclusion
In conclusion, the Indian Pipe Plant or Monotropa is classified as a saprophyte. It lacks chlorophyll and relies on mycorrhizal fungi to obtain nutrients from decaying organic matter. Understanding the classification of plants helps us appreciate the diversity of the plant kingdom and their unique adaptations for survival.
Roots develop from parts of the plant other than radicle are called- a) tap roots
- b) fibrous roots
- c) adventitious roots
- d) nodular roots
Correct answer is option 'C'. Can you explain this answer?
Roots develop from parts of the plant other than radicle are called
a)
tap roots
b)
fibrous roots
c)
adventitious roots
d)
nodular roots
|
|
Nishanth Jain answered |
Adventitious roots are the type of roots that are grown from different parts of plants such as stem, leaf and tubers etc.
These are used in vegetative propagation.
These are mostly grown on root tubers and the apex of these tubers contains numerous adventitious roots which grow into new plants.
Read more on Brainly.in - https://brainly.in/question/147876#readmore
Cork is formed from- a) phellogen
- b) vascular cambium
- c) phloem
- d) xylem
Correct answer is option 'A'. Can you explain this answer?
Cork is formed from
a)
phellogen
b)
vascular cambium
c)
phloem
d)
xylem
|
|
Akanksha Ahuja answered |
The meristematic cell layer which is responsible for the development of the periderm is called phelloge. It produces cells both in and outwards. Cells which grow inwards will be phelloderm, and cells which develop outwards will be phellem or cork
A plant that has seeds but no flowers and fruits?- a)Bryophyte
- b)Gymnosperms
- c)Mosses
- d)Pteridophyte
Correct answer is option 'B'. Can you explain this answer?
A plant that has seeds but no flowers and fruits?
a)
Bryophyte
b)
Gymnosperms
c)
Mosses
d)
Pteridophyte
|
|
Saanvi Iyer answered |
Gymnosperms evolved to have seeds but do not have flowers. Examples of gymnosperms include the Redwood, Fir, and Cypress trees. Gymnos means "naked" in Greek; the seeds of gymnosperms are naked, not protected by flowers. Flowering plants, or angiosperms, evolved to have vascular tissue, seeds, and flowers.
The chief function of vessels in the plant body is- a) to translocate food material
- b) to conduct water and mineral salts
- c) to support living cells
- d) all above
Correct answer is option 'B'. Can you explain this answer?
The chief function of vessels in the plant body is
a)
to translocate food material
b)
to conduct water and mineral salts
c)
to support living cells
d)
all above
|
|
Dipika Gupta answered |
Xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support.
A tissue is a group of cells which are- a)similar in origin, but dissimilar in form and function.
- b)dissimilar in origin, form and function.
- c)dissimilar in origin, but similar in form and function.
- d)similar in origin, form and function.
Correct answer is option 'D'. Can you explain this answer?
A tissue is a group of cells which are
a)
similar in origin, but dissimilar in form and function.
b)
dissimilar in origin, form and function.
c)
dissimilar in origin, but similar in form and function.
d)
similar in origin, form and function.
|
|
Surbhi Basu answered |
Tissue is a group of cells which act together to perform a specific task. If we talk about a single tissue then, all the cells constituting it performs similar function.
Fungi are plants that lack:- a)Oxygen
- b)Carbon dioxide
- c)Chlorophyll
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Fungi are plants that lack:
a)
Oxygen
b)
Carbon dioxide
c)
Chlorophyll
d)
None of these
|
|
Ipsita Dey answered |
We know plants prepare their own food and so are known as autotrophs. With the help of photosynthesis they make food in which they produce glucose from carbon dioxide and sunlight. Also, oxygen is released by plants which is further used by humans and other animals. But Fungi lack chlorophyll and do not engage in photosynthesis.
.If a,b,c are any three vectors, the statement is true- a)ax(bxc)=(axb)xc
- b)axb=bxa
- c)a.(bxc)=a.b+a.c
- d)a.(b-c)=a.b-a.c
Correct answer is option 'D'. Can you explain this answer?
If a,b,c are any three vectors, the statement is true
a)
ax(bxc)=(axb)xc
b)
axb=bxa
c)
a.(bxc)=a.b+a.c
d)
a.(b-c)=a.b-a.c
|
Partho Sen answered |
D is the correct option.a.(b-c)=a.b-a.c is correct if a,b,c are any three vectors.
Which one of the following process releases a carbon dioxide molecule?- a) Glycolysis
- b) Lactic acid fermentation
- c) Alcohol fermentation
- d) Hydrolysis of glycogen
Correct answer is option 'C'. Can you explain this answer?
Which one of the following process releases a carbon dioxide molecule?
a)
Glycolysis
b)
Lactic acid fermentation
c)
Alcohol fermentation
d)
Hydrolysis of glycogen
|
|
Shreya Mishra answered |
Lactic acid fermentation is a metabolic process by which glucose and other six-carbon sugars (also, disaccharides of six-carbon sugars, e.g. sucrose or lactose) are converted into cellular energy and the metabolite lactate.
Which of the following plant growth hormone was recognized by Japanese scientists? - a)Auxin
- b)Gibberellins
- c)Abscisic acid
- d)Cytokinin
Correct answer is option 'B'. Can you explain this answer?
Which of the following plant growth hormone was recognized by Japanese scientists?
a)
Auxin
b)
Gibberellins
c)
Abscisic acid
d)
Cytokinin
|
|
Saikat Malik answered |
Gibberellins, first recognized in 1926 by a Japanese scientist, Eiichi Kurosawa. He was studying foolish seedling disease in Rice called as bakanae.
Lignin is the important constituent in the cell wall of- a) phloem
- b) parenchyma
- c) xylem
- d) cambium
Correct answer is option 'C'. Can you explain this answer?
Lignin is the important constituent in the cell wall of
a)
phloem
b)
parenchyma
c)
xylem
d)
cambium
|
|
Aashna Patel answered |
Lignin is a constituent of the cell walls of almost all dry land plant cell walls.
The structure of white phosphorus is- a)Square planar
- b)Pyramidal
- c)Tetrahedral
- d)Trigonal planar
Correct answer is option 'C'. Can you explain this answer?
The structure of white phosphorus is
a)
Square planar
b)
Pyramidal
c)
Tetrahedral
d)
Trigonal planar
|
Tanuja Kapoor answered |
C is the correct option.The structure of white phosphorus is tetrahedral.
White phosphorus, yellow phosphorus or simply tetraphosphorus (P4) exists as molecules made up of four atoms in a tetrahedral structure. The tetrahedral arrangement results in ring strain and instability. The molecule is described as consisting of six single P–P bonds.
White phosphorus, yellow phosphorus or simply tetraphosphorus (P4) exists as molecules made up of four atoms in a tetrahedral structure. The tetrahedral arrangement results in ring strain and instability. The molecule is described as consisting of six single P–P bonds.
A yellow dust appears on the fingers, whenever we touch the middle of a flower. These tiny yellow grains are one of the most precious substances in nature because they contain the secret of plant life. What is this dust called?- a)Pollen
- b)Sperm
- c)Spore
- d)Sporocyst
Correct answer is option 'A'. Can you explain this answer?
A yellow dust appears on the fingers, whenever we touch the middle of a flower. These tiny yellow grains are one of the most precious substances in nature because they contain the secret of plant life. What is this dust called?
a)
Pollen
b)
Sperm
c)
Spore
d)
Sporocyst
|
|
Aashna Singh answered |
The yellow powder is called pollen and the stick that holds it is known as stamen.
Plants which are adapted to grow in soils containing high concentration of salt are known as:- a)Xerophytes
- b)Mesophytes
- c)Halophytes
- d)Thallop
Correct answer is option 'C'. Can you explain this answer?
Plants which are adapted to grow in soils containing high concentration of salt are known as:
a)
Xerophytes
b)
Mesophytes
c)
Halophytes
d)
Thallop
|
|
Gargi Saha answered |
Halophytes are salt-tolerant plants that grow in waters with high salinity, such as in mangrove swamps, marshes, seashores and saline semi-deserts. Only two per cent of the plant species found on the Earth are halophytes.
An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B. Compound B gives blue colour salt in Victor Meyer's test. The compounds A and B are respectively.- a)Acetaldehyde, tertiary butyl alcohol
- b)Acetaldehyde, ethyl alcohol
- c)Acetaldehyde, isopropyl alcohol
- d)Acetone, isopropyl alcohol
Correct answer is option 'C'. Can you explain this answer?
An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B. Compound B gives blue colour salt in Victor Meyer's test. The compounds A and B are respectively.
a)
Acetaldehyde, tertiary butyl alcohol
b)
Acetaldehyde, ethyl alcohol
c)
Acetaldehyde, isopropyl alcohol
d)
Acetone, isopropyl alcohol
|
Priya Khanna answered |
Compound B is a sec. alcohol since it gives blue colour in Victor-Meyer test and sec alcohol are obtained by the action of CH3MgIon an aldehyde other than formaldehyde.
Find the true statement:- a) Meristematic cells are not compactly arranged.
- b) Collenchyma is not a simple tissue.
- c) the term histology was coined by Meyer
- d) None of these
Correct answer is option 'C'. Can you explain this answer?
Find the true statement:
a)
Meristematic cells are not compactly arranged.
b)
Collenchyma is not a simple tissue.
c)
the term histology was coined by Meyer
d)
None of these
|
Raghav Patel answered |
C is the correct option.
- Collenchyma is a simple tissue.
- The meristematic cells are compactly arranged & do not contain any intercellular space between them.
- The term 'histology', from the Greek 'hίstos' for a 'web', appears in the title of Carl Mayer's (1787 – 1865) 41-page book Ueber Histologie und eine neue Eintheilung der Gewebe des menschlichen Körpers which was published by Adolph Marcus of Bonn in 1819. Hence, the statement is correct.
Girth of stem increases due to- a) apical meristem
- b) lateral meristem
- c) intercalary meristem
- d) vertical meristem
Correct answer is option 'B'. Can you explain this answer?
Girth of stem increases due to
a)
apical meristem
b)
lateral meristem
c)
intercalary meristem
d)
vertical meristem
|
|
Anshul Verma answered |
The girth of the stem increases due to lateral meristem or cambium
Day neutral plants relate to- a)flowering in all possible photoperiods.
- b)loss of activity during day time.
- c) overactive during day time.
- d) no flowering in any photoperiods.
Correct answer is option 'A'. Can you explain this answer?
Day neutral plants relate to
a)
flowering in all possible photoperiods.
b)
loss of activity during day time.
c)
overactive during day time.
d)
no flowering in any photoperiods.
|
Ashutosh Chavan answered |
Short day plants are those plants that begin flowering when the days are shorter than their critical day length. They require the long period of darkness and the short period of light to flower. Long day plants are those plants that begin flowering when the days are longer than their critical day length. They will flower when they are exposed to the short period of darkness and the long period of light. Day neutral plants do not depend upon the amount of darkness or daylight hours for flowering. They flower independent of day length. Examples of day neutral plants are sunflower and tomato.
Thus, the correct answer is option B
Thus, the correct answer is option B
ESMA - a)Essential Service Milestone Act
- b)Essential Service Maintenance Act
- c)Essential Service Management Act
- d)Essential Service Migration Act
Correct answer is option 'B'. Can you explain this answer?
a)
Essential Service Milestone Act
b)
Essential Service Maintenance Act
c)
Essential Service Management Act
d)
Essential Service Migration Act
|
|
Ankita Sengupta answered |
Essential Service Maintenance Act
The correct answer is option 'B', Essential Service Maintenance Act. This act is designed to ensure the maintenance of essential services during times of crisis or emergencies. Here is a detailed explanation of this answer:
Definition:
The Essential Service Maintenance Act (ESMA) is a legislation that empowers the government to declare any service as "essential" for the maintenance of public order. This act allows the government to prohibit strikes and lockouts in essential services to ensure their uninterrupted operation.
Objective:
The main objective of ESMA is to prevent disruptions in essential services such as healthcare, transportation, communication, and public utilities during times of crisis. By prohibiting strikes and lockouts in these sectors, the act aims to safeguard the interests of the public and ensure the smooth functioning of vital services.
Implementation:
ESMA is typically invoked by the government when there is a threat of disruption in essential services due to strikes or other forms of industrial action. Once declared, the act empowers the authorities to take necessary measures to maintain the continuity of essential services and prevent any disruptions that may affect public order.
Controversies:
While ESMA serves an important purpose in safeguarding essential services, it has also faced criticism for restricting the rights of workers to strike and bargain collectively. Some argue that the act infringes on the fundamental rights of workers and limits their ability to negotiate for better working conditions.
In conclusion, the Essential Service Maintenance Act plays a crucial role in ensuring the uninterrupted operation of essential services during emergencies. While it is a powerful tool for maintaining public order, it is important to strike a balance between the interests of the public and the rights of workers.
The correct answer is option 'B', Essential Service Maintenance Act. This act is designed to ensure the maintenance of essential services during times of crisis or emergencies. Here is a detailed explanation of this answer:
Definition:
The Essential Service Maintenance Act (ESMA) is a legislation that empowers the government to declare any service as "essential" for the maintenance of public order. This act allows the government to prohibit strikes and lockouts in essential services to ensure their uninterrupted operation.
Objective:
The main objective of ESMA is to prevent disruptions in essential services such as healthcare, transportation, communication, and public utilities during times of crisis. By prohibiting strikes and lockouts in these sectors, the act aims to safeguard the interests of the public and ensure the smooth functioning of vital services.
Implementation:
ESMA is typically invoked by the government when there is a threat of disruption in essential services due to strikes or other forms of industrial action. Once declared, the act empowers the authorities to take necessary measures to maintain the continuity of essential services and prevent any disruptions that may affect public order.
Controversies:
While ESMA serves an important purpose in safeguarding essential services, it has also faced criticism for restricting the rights of workers to strike and bargain collectively. Some argue that the act infringes on the fundamental rights of workers and limits their ability to negotiate for better working conditions.
In conclusion, the Essential Service Maintenance Act plays a crucial role in ensuring the uninterrupted operation of essential services during emergencies. While it is a powerful tool for maintaining public order, it is important to strike a balance between the interests of the public and the rights of workers.
Alternate type of phyllotaxy is found in- a) china rose
- b) mustard
- c) sunflower
- d) all of these
Correct answer is option 'D'. Can you explain this answer?
Alternate type of phyllotaxy is found in
a)
china rose
b)
mustard
c)
sunflower
d)
all of these
|
|
Aashna Singh answered |
In alternate (or spiral) type of phyllotaxy, only one leaf is borne at each node and leaves are arranged alternatively giving a spiral form. Example chinarose, mustard & sunflower.
Which of the following is an epidermal cell- a) Guard cells
- b) Root hairs
- c) Trichome
- d) All of these
Correct answer is option 'D'. Can you explain this answer?
Which of the following is an epidermal cell
a)
Guard cells
b)
Root hairs
c)
Trichome
d)
All of these
|
|
Simran Menon answered |
Epidermal cells from the outer covering or surface which is mainly involved in protection and secretion. Guard cells, root hairs, and trichomes are all modifications of the epidermal cells.
(i) Root hair
Structure:
Unicellular hairs are the extensions of an epidermal cell of roots in the root hair zone.
Function:
It increases the surface area for absorption of water and minerals.
(ii) Epidermal appendages
Structure:
These are called trichomes and are epidermal cell modifications. There may be unicellular or multicellular.
Functions:
Some perform for stinging produces and some glandular secretions.
(iii) Guard cell
Structure:
These are bean-shaped cells present on the epidermis of the leaf.
Functions:
These help in gaseous exchange and transpiration.
(i) Root hair
Structure:
Unicellular hairs are the extensions of an epidermal cell of roots in the root hair zone.
Function:
It increases the surface area for absorption of water and minerals.
(ii) Epidermal appendages
Structure:
These are called trichomes and are epidermal cell modifications. There may be unicellular or multicellular.
Functions:
Some perform for stinging produces and some glandular secretions.
(iii) Guard cell
Structure:
These are bean-shaped cells present on the epidermis of the leaf.
Functions:
These help in gaseous exchange and transpiration.
Turmeric belongs to from which one of the following family of plants?- a)Radish
- b)Ginger
- c)Onion
- d)Clove
Correct answer is option 'B'. Can you explain this answer?
Turmeric belongs to from which one of the following family of plants?
a)
Radish
b)
Ginger
c)
Onion
d)
Clove
|
|
Anshul Verma answered |
Turmeric is a perennial species of herb belonging to the Zingiberaceae family, same as ginger. It is stark yellow to orange in color. Turmeric is also a rhizome that is used extensively for its anti-inflammatory properties.
Which among the following is the correct meaning of Phyllotaxy?- a)Classification of plants as per the leaves structure
- b)The manner of arrangement of leaves in stem or branch
- c)The manner the leaves fall from the branches
- d)The anatomy of leaves in angiosperms
Correct answer is option 'B'. Can you explain this answer?
Which among the following is the correct meaning of Phyllotaxy?
a)
Classification of plants as per the leaves structure
b)
The manner of arrangement of leaves in stem or branch
c)
The manner the leaves fall from the branches
d)
The anatomy of leaves in angiosperms
|
|
Aashna Patel answered |
The manner of arrangement of leaves in stem or branch is called Phyllotaxy
'Saffron’ is obtained from which among the following parts of the plant?- a) Stigma
- b)Anther
- c) Stamen
- d)Pollen
Correct answer is option 'A'. Can you explain this answer?
'Saffron’ is obtained from which among the following parts of the plant?
a)
Stigma
b)
Anther
c)
Stamen
d)
Pollen
|
|
Janhavi Bajaj answered |
Saffron is obtained by hand picking the yellow stigma and style (the female reproductive part) of plant Crocus sativus that normally grows in the Sub Himalayan region. Thousands of plants are needed to collect one gram of saffron.
'Anemophily’ is pollination by: - a)Birds
- b)Wind
- c)Ants
- d) Bats
Correct answer is option 'B'. Can you explain this answer?
'Anemophily’ is pollination by:
a)
Birds
b)
Wind
c)
Ants
d)
Bats
|
|
Saanvi Iyer answered |
Abiotic pollination refers to situations where pollination is mediated without the involvement of other organisms. The most common form of abiotic pollination, anemophily, is pollination by wind. This form of pollination is predominant in grasses, most conifers, and many deciduous trees.Of the 20% of abiotically pollinated species, 98% are anemophilous and 2% hydrophilous, being pollinated by water.
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