All Exams >
BPSC (Bihar) >
Science & Technology for State PSC Exams >
All Questions
All questions of Biology 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
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
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
- 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.
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
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.
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
|
Don India answered |
Because most of the angiosperms are terrestrial and thus they show lesser adaptation for Marine habitat.
due to evolution the plants move from water to land as the generations pass.
due to evolution the plants move from water to land as the generations pass.
With reference to the human body, consider the following statements:
1. The production of somatropin goes up when a person exercises.
2. Men’s testes produce progesterone.
3. Women’s adrenal glands secret testosterone.
4. Stress causes the adrenal to release very less amount of cortisol than usual.Q. Which of these statements are correct?- a)1, 2, 3 and 4
- b)1, 2 and 3
- c)2, 3 and 4
- d)1 and 4
Correct answer is option 'D'. Can you explain this answer?
With reference to the human body, consider the following statements:
1. The production of somatropin goes up when a person exercises.
2. Men’s testes produce progesterone.
3. Women’s adrenal glands secret testosterone.
4. Stress causes the adrenal to release very less amount of cortisol than usual.
1. The production of somatropin goes up when a person exercises.
2. Men’s testes produce progesterone.
3. Women’s adrenal glands secret testosterone.
4. Stress causes the adrenal to release very less amount of cortisol than usual.
Q. Which of these statements are correct?
a)
1, 2, 3 and 4
b)
1, 2 and 3
c)
2, 3 and 4
d)
1 and 4
|
|
Surbhi Basu answered |
During exercise, the level of somatotropin goes up. Testes secrete testosterone and females’ adrenal glands secrete progesterone. Stress causes the adrenal glands to release very less amount of cortisol (a steroid hormone) than usual.
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.
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.
Consider the following statements:
1. Human beings have 23 pairs of chromosomes.
2. Sex chromosome in human male is named XX.
3. Chromosomes are best seen in metaphase.Q. Which of the statements given above are false about chromosomes?- a)1 and 2
- b)2 only
- c)1, 2 and 3
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements:
1. Human beings have 23 pairs of chromosomes.
2. Sex chromosome in human male is named XX.
3. Chromosomes are best seen in metaphase.
1. Human beings have 23 pairs of chromosomes.
2. Sex chromosome in human male is named XX.
3. Chromosomes are best seen in metaphase.
Q. Which of the statements given above are false about chromosomes?
a)
1 and 2
b)
2 only
c)
1, 2 and 3
d)
None of these
|
|
Nitya Gupta answered |
Humans are diploid organisms by having two members or homologous chromosomes in a pair. Total 23 pairs of chromosomes exist in each somatic cell of the body. Total 46 chromosomes occur. One particular pair individually in male and female determines their respective sex. This one pair is XX in females and XY in males. All the 46 chromosomes in pairs can be seen under microscope at metaphase stage in the cells which are undergoing mitosis.
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.
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.
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 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.
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.
Consider the following statements:
1. Warm-blooded animals can remain active in cold environment in which cold-blooded animals can hardly move.
2. Cold-blooded animals require much less energy to survive than warm-blooded animals.
Q. Which of the statements given above is/are correct?
- a)1 only
- b)Both 1 and 2
- c)2 only
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements:
1. Warm-blooded animals can remain active in cold environment in which cold-blooded animals can hardly move.
2. Cold-blooded animals require much less energy to survive than warm-blooded animals.
1. Warm-blooded animals can remain active in cold environment in which cold-blooded animals can hardly move.
2. Cold-blooded animals require much less energy to survive than warm-blooded animals.
Q. Which of the statements given above is/are correct?
a)
1 only
b)
Both 1 and 2
c)
2 only
d)
Neither 1 nor 2
|
|
Sagarika Menon answered |
The correct answer is:
- Both 1 and 2
Explanation:
- This statement is correct. Warm-blooded animals have the ability to regulate their internal body temperature, allowing them to remain active in cold environments where cold-blooded animals may struggle due to their reliance on external sources of heat for temperature regulation.
- This statement is also correct. Cold-blooded animals typically have lower metabolic rates and require much less energy to survive compared to warm-blooded animals, which need to maintain a constant internal body temperature through metabolic processes that require more energy.
Consider the following statements and choose the correct code.
Assertion (A): A true nucleus is absent in E. coli and other prokaryotes.
Reason (R): An undifferentiated, unorganised fibrillar chromosome existsinside the prokaryotic cells.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is false, but R is true.
- d)Both A and R are false.
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements and choose the correct code.
Assertion (A): A true nucleus is absent in E. coli and other prokaryotes.
Reason (R): An undifferentiated, unorganised fibrillar chromosome existsinside the prokaryotic cells.
Assertion (A): A true nucleus is absent in E. coli and other prokaryotes.
Reason (R): An undifferentiated, unorganised fibrillar chromosome existsinside the prokaryotic cells.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true, but R is not the correct explanation of A.
c)
A is false, but R is true.
d)
Both A and R are false.
|
|
Srishti Nambiar answered |
In the prokaryotes, all the genetic materials lie inside the cell, no clear or separate nuclear wall is recognized in these cells. In fact no membranebound organelles are found in the prokaryotes. While on the other hand, one of the characteristic features of the eukaryotic cells is the presence of membrane bound organelles. Clear and distinguished nuclear membrane bounds the genetic material inside.
What is the advantage of micropropagation by plant tissue culture?- a)It produces genetically diverse plants.
- b)It requires a large amount of space.
- c)It can produce virus-free clones.
- d)It is limited to dicot plants.
Correct answer is option 'C'. Can you explain this answer?
a)
It produces genetically diverse plants.
b)
It requires a large amount of space.
c)
It can produce virus-free clones.
d)
It is limited to dicot plants.
|
Academic Studio answered |
Micropropagation by plant tissue culture has the advantage of producing virus-free clones by raising callus from shoot apex. This technique is useful for obtaining disease-free plants.
Which of the following diseases are infectious in milch animals?
1. Hand diseases
2. Anthrax
3. Black quarter
4. Cowpox
Q. Select the correct answer from the codes given below:- a)1, 2 and 3
- b)2, 3 and 4
- c)1 and 4
- d)1, 2, 3 and 4
Correct answer is option 'B'. Can you explain this answer?
Which of the following diseases are infectious in milch animals?
1. Hand diseases
2. Anthrax
3. Black quarter
4. Cowpox
Q. Select the correct answer from the codes given below:
1. Hand diseases
2. Anthrax
3. Black quarter
4. Cowpox
Q. Select the correct answer from the codes given below:
a)
1, 2 and 3
b)
2, 3 and 4
c)
1 and 4
d)
1, 2, 3 and 4
|
|
Hiral Singh answered |
Milch animals are those animals which are source of milk, e.g. cow, goat, buffalo. Foot-andmouth disease, caused by Aphthae epizooticae is an infectious disease that affects cloven-hoofed animals. Anthrax is an acute infectious disease caused by the bacterium Bacillus anthracis. Blackleg, black quarter is an infectious bacterial disease caused by Clostridium chauvoei affecting cattle, sheep and goats. Cowpox is caused by cowpox virus and is infectious.
Consider the following statements:
Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R): DNA fragments can be manipulated from restriction endonucleases and DNA ligases.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is true, but R is false.
- d)A is false, but R is true.
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements:
Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R): DNA fragments can be manipulated from restriction endonucleases and DNA ligases.
Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R): DNA fragments can be manipulated from restriction endonucleases and DNA ligases.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true, but R is not the correct explanation of A.
c)
A is true, but R is false.
d)
A is false, but R is true.
|
|
Rishabh Sen answered |
In genetic engineering, a DNA segment from any foreign source can be inserted into any other genetic material. The enzymes, called restriction endonucleases, act like scissors that cut apart a particular or specific part of the DNA. This cut out DNA piece can be inserted into other genetic material which has been cut to make space for containing the foreign DNA. The DNA once inserted can be ligated by enzymes known as ligases.
Consider the following statements:
Assertion(A): In humans, female sex is determined by XX-chromosomes.
Reason(R): Male sex is determined by YY-chromosomes.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is true, but R is false.
- d)A is false, but R is true.
Correct answer is option 'C'. Can you explain this answer?
Consider the following statements:
Assertion(A): In humans, female sex is determined by XX-chromosomes.
Reason(R): Male sex is determined by YY-chromosomes.
Assertion(A): In humans, female sex is determined by XX-chromosomes.
Reason(R): Male sex is determined by YY-chromosomes.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true, but R is not the correct explanation of A.
c)
A is true, but R is false.
d)
A is false, but R is true.
|
|
Amrutha Kapoor answered |
Humans are diploid with 23 pairs of chromosomes. Of this, 22 pairs are somatic and the one pair is sex chromosomes. This particular pair exists as XX in human females and XY in males. The presence of two X chromosomes contributes to the female phenotype while presence of only one Y chromosome is responsible for the human to be male. Females produce only X-type haploid gametes and males produce two types (X and Y) of haploid gametes. Fusion of either X or Y of male gamete with the female gamete determines the sex of the offspring.
Consider the following statements and select the correct answer from the codes given below:
Assertion (A): If somebody stops taking green vegetables, he will suffer from night blindness.
Reason (R): He will suffer from vitamin A deficiency.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is true, but R is false.
- d)A is false, but R is true.
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements and select the correct answer from the codes given below:
Assertion (A): If somebody stops taking green vegetables, he will suffer from night blindness.
Reason (R): He will suffer from vitamin A deficiency.
Assertion (A): If somebody stops taking green vegetables, he will suffer from night blindness.
Reason (R): He will suffer from vitamin A deficiency.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true, but R is not the correct explanation of A.
c)
A is true, but R is false.
d)
A is false, but R is true.
|
|
Akanksha Ahuja answered |
Vitamin A has a major role in phototransduction. Its deficiency causes night blindness in humans. Xerophthalmia, keratomalacia can also occur with its deficiency. Green, yellow-orange-red (dark- coloured) fruits and vegetables, eggs, milk; fortified cereals are rich source of vitamin A. Their avoidance over a long period may cause the vit-A deficiency symptoms.
What term is used to describe the elimination of defective germplasm in a society through measures like sexual separation and sterilization?- a)Genetic engineering
- b)Genetic counseling
- c)Positive eugenics
- d)Negative eugenics
Correct answer is option 'D'. Can you explain this answer?
a)
Genetic engineering
b)
Genetic counseling
c)
Positive eugenics
d)
Negative eugenics
|
Future Foundation Institute answered |
Negative eugenics refers to the elimination of defective germplasm in a society through measures like sexual separation and sterilization.
Consider the following statements:
1. Dengue is a protozoan disease transmitted by mosquitos.
2. Retro-orbital pain is not a symptom of dengue.
3. Skin rash and bleeding from nose and gums are some of the symptoms of the dengue.
Q. Which of the statements given above is/are correct?- a)1 and 2 only
- b)2 only
- c)3 only
- d)1 and 3 only
Correct answer is option 'C'. Can you explain this answer?
Consider the following statements:
1. Dengue is a protozoan disease transmitted by mosquitos.
2. Retro-orbital pain is not a symptom of dengue.
3. Skin rash and bleeding from nose and gums are some of the symptoms of the dengue.
Q. Which of the statements given above is/are correct?
1. Dengue is a protozoan disease transmitted by mosquitos.
2. Retro-orbital pain is not a symptom of dengue.
3. Skin rash and bleeding from nose and gums are some of the symptoms of the dengue.
Q. Which of the statements given above is/are correct?
a)
1 and 2 only
b)
2 only
c)
3 only
d)
1 and 3 only
|
|
Amrita Bose answered |
Dengue is a viral disease transmitted through mosquito. Fever, headache, pain in joints, back muscles and eyeballs, skin rash for a few days, bleeding from nose and gums are some of the symptoms of the dengue fever.
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.
Match List-I with List-II and select the correct answer from the codes given below:
List-I List-II
(Bone) (Name)
A. Breast bone 1. Clavicle
B. Collar bone 2. Patella
C. Knee cap 3. Scapula
D. Shoulder blade 4. Sternum- a)A: 4, B: 1, C: 3, D: 2
- b)A:1, B: 4, C: 3, D: 2
- c)A: 1, B: 4, C: 2, D: 3
- d)A:4, B: 1, C: 2, D: 3
Correct answer is option 'D'. Can you explain this answer?
Match List-I with List-II and select the correct answer from the codes given below:
List-I List-II
(Bone) (Name)
A. Breast bone 1. Clavicle
B. Collar bone 2. Patella
C. Knee cap 3. Scapula
D. Shoulder blade 4. Sternum
List-I List-II
(Bone) (Name)
A. Breast bone 1. Clavicle
B. Collar bone 2. Patella
C. Knee cap 3. Scapula
D. Shoulder blade 4. Sternum
a)
A: 4, B: 1, C: 3, D: 2
b)
A:1, B: 4, C: 3, D: 2
c)
A: 1, B: 4, C: 2, D: 3
d)
A:4, B: 1, C: 2, D: 3
|
|
Surbhi Basu answered |
Sternum is the breast bone. Clavicle is the collar bone. Patella is the knee cap. Scapula is the shoulder blade.
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
|
Preethi Chauhan answered |
Fungi are not plants because they lack chlorophyll, which is a key characteristic of plants. Chlorophyll is a pigment found in the chloroplasts of plant cells that is responsible for capturing sunlight and converting it into energy through the process of photosynthesis. Fungi, on the other hand, obtain their nutrients by absorbing organic matter from their environment, such as decaying plant and animal material.
Here is a detailed explanation of why fungi are not plants:
1. Absence of Chlorophyll:
Chlorophyll is essential for plants to carry out photosynthesis, the process by which they convert sunlight into energy. Fungi do not possess chlorophyll and are incapable of performing photosynthesis. Instead, they obtain their energy by breaking down organic matter through the secretion of enzymes and absorbing the resulting nutrients.
2. Mode of Nutrition:
Fungi are heterotrophic organisms, meaning they cannot produce their own food and rely on external sources for nutrients. They are decomposers, playing a crucial role in the ecosystem by breaking down dead organic matter and recycling nutrients. In contrast, plants are autotrophic organisms that can synthesize their own food through photosynthesis.
3. Cell Wall Composition:
The cell walls of fungi are primarily composed of chitin, a tough and flexible polysaccharide. In contrast, the cell walls of plants are composed of cellulose. This difference in cell wall composition is another distinguishing feature between fungi and plants.
4. Reproduction:
Fungi have a unique mode of reproduction that sets them apart from plants. While plants reproduce through seeds or spores produced within flowers or cones, fungi reproduce through the production of spores, which are released into the environment to establish new fungal colonies.
5. Taxonomic Classification:
Fungi belong to the kingdom Fungi, which is distinct from the kingdom Plantae. The kingdom Fungi includes diverse organisms such as mushrooms, yeasts, molds, and lichens. This taxonomic classification further emphasizes the biological differences between fungi and plants.
In conclusion, fungi are not plants because they lack chlorophyll, have a different mode of nutrition, possess cell walls made of chitin, reproduce differently, and are classified in a separate kingdom. These characteristics differentiate fungi from plants and highlight their unique biological features.
Here is a detailed explanation of why fungi are not plants:
1. Absence of Chlorophyll:
Chlorophyll is essential for plants to carry out photosynthesis, the process by which they convert sunlight into energy. Fungi do not possess chlorophyll and are incapable of performing photosynthesis. Instead, they obtain their energy by breaking down organic matter through the secretion of enzymes and absorbing the resulting nutrients.
2. Mode of Nutrition:
Fungi are heterotrophic organisms, meaning they cannot produce their own food and rely on external sources for nutrients. They are decomposers, playing a crucial role in the ecosystem by breaking down dead organic matter and recycling nutrients. In contrast, plants are autotrophic organisms that can synthesize their own food through photosynthesis.
3. Cell Wall Composition:
The cell walls of fungi are primarily composed of chitin, a tough and flexible polysaccharide. In contrast, the cell walls of plants are composed of cellulose. This difference in cell wall composition is another distinguishing feature between fungi and plants.
4. Reproduction:
Fungi have a unique mode of reproduction that sets them apart from plants. While plants reproduce through seeds or spores produced within flowers or cones, fungi reproduce through the production of spores, which are released into the environment to establish new fungal colonies.
5. Taxonomic Classification:
Fungi belong to the kingdom Fungi, which is distinct from the kingdom Plantae. The kingdom Fungi includes diverse organisms such as mushrooms, yeasts, molds, and lichens. This taxonomic classification further emphasizes the biological differences between fungi and plants.
In conclusion, fungi are not plants because they lack chlorophyll, have a different mode of nutrition, possess cell walls made of chitin, reproduce differently, and are classified in a separate kingdom. These characteristics differentiate fungi from plants and highlight their unique biological features.
Consider the following statements:
1. Frogs can breathe by lungs as well as skin.
2. Gills are not present in any stage of lifespan of frogs.Q. Which of the statements given above is/are correct?- a)1 and 2 only
- b)1 only
- c)2 only
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements:
1. Frogs can breathe by lungs as well as skin.
2. Gills are not present in any stage of lifespan of frogs.
1. Frogs can breathe by lungs as well as skin.
2. Gills are not present in any stage of lifespan of frogs.
Q. Which of the statements given above is/are correct?
a)
1 and 2 only
b)
1 only
c)
2 only
d)
Neither 1 nor 2
|
Pragati Banerjee answered |
Explanation:
Frogs are amphibians that have adaptations to live both on land and in water. They have unique respiratory systems that allow them to breathe in both air and water. Let's take a look at the given statements.
1. Frogs can breathe by lungs as well as skin.
This statement is true. Frogs have lungs that allow them to breathe in air, just like humans. However, they also have a unique adaptation that allows them to breathe through their skin. Their skin is thin and moist, which makes it easier for oxygen to diffuse into their bloodstream. This is especially helpful when they are underwater and cannot breathe through their lungs.
2. Gills are not present in any stage of lifespan of frogs.
This statement is also true. While some amphibians, such as salamanders, have gills as larvae, frogs do not. Instead, they undergo a metamorphosis from tadpole to adult frog. During this process, their gills are replaced by lungs, and they develop the ability to breathe through their skin.
In conclusion, both statements are true, but only statement 1 is correct. Frogs can breathe by lungs as well as skin, but they do not have gills at any stage of their lifespan.
Frogs are amphibians that have adaptations to live both on land and in water. They have unique respiratory systems that allow them to breathe in both air and water. Let's take a look at the given statements.
1. Frogs can breathe by lungs as well as skin.
This statement is true. Frogs have lungs that allow them to breathe in air, just like humans. However, they also have a unique adaptation that allows them to breathe through their skin. Their skin is thin and moist, which makes it easier for oxygen to diffuse into their bloodstream. This is especially helpful when they are underwater and cannot breathe through their lungs.
2. Gills are not present in any stage of lifespan of frogs.
This statement is also true. While some amphibians, such as salamanders, have gills as larvae, frogs do not. Instead, they undergo a metamorphosis from tadpole to adult frog. During this process, their gills are replaced by lungs, and they develop the ability to breathe through their skin.
In conclusion, both statements are true, but only statement 1 is correct. Frogs can breathe by lungs as well as skin, but they do not have gills at any stage of their lifespan.
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.
Which nutrient is primarily responsible for the body's growth and maintenance?- a)Vitamins
- b)Minerals
- c)Proteins
- d)Carbohydrates
Correct answer is option 'C'. Can you explain this answer?
a)
Vitamins
b)
Minerals
c)
Proteins
d)
Carbohydrates
|
Master Training Institute answered |
Proteins are primarily responsible for the body's growth and maintenance. They are essential for building and repairing tissues.
Consider the following statements and choose the correct code.
Assertion (A): Regeneration in animals is one of the strategies to escape predation.
Reason (R): These strategies include the rearrangement of pre-existing tissue.- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is false, but R is true.
- d)Both A and R are false.
Correct answer is option 'D'. Can you explain this answer?
Consider the following statements and choose the correct code.
Assertion (A): Regeneration in animals is one of the strategies to escape predation.
Reason (R): These strategies include the rearrangement of pre-existing tissue.
Assertion (A): Regeneration in animals is one of the strategies to escape predation.
Reason (R): These strategies include the rearrangement of pre-existing tissue.
a)
Both A and R are true and R is the correct explanation of A.
b)
Both A and R are true, but R is not the correct explanation of A.
c)
A is false, but R is true.
d)
Both A and R are false.
|
|
Debanshi Sarkar answered |
Both assertion and reason are false. Regeneration is not itself a strategy but rather the shedding off of any organ is a strategy to avoid predation. The strategy to regenerate the body parts from the preexisting tissue or adult stem cells. This actually involves the de-differentiation of the mature cells to make them a sort of stem cells again which can then differentiate to make the lost part. The later strategy is different than the strategy involved in escaping predation.
Match List-I (animals) with List-II (class/ phylum) and select the correct answer from the codes given below:
List-I List-IIA. Octopus 1. Pisces
B. Jellyfish 2. Arthropoda
C. Silver fish 3. Mollusca
D. Bombay duck 4. Coelenterata- a)A: 3, B: 4, C: 2, D: 1
- b)A: 3, B: 2, C: 4, D: 1
- c)A: 2, B: 3, C: 1, D:4
- d)A: 2, B: 1, C: 3, D: 4
Correct answer is option 'A'. Can you explain this answer?
Match List-I (animals) with List-II (class/ phylum) and select the correct answer from the codes given below:
List-I List-II
List-I List-II
A. Octopus 1. Pisces
B. Jellyfish 2. Arthropoda
C. Silver fish 3. Mollusca
D. Bombay duck 4. Coelenterata
B. Jellyfish 2. Arthropoda
C. Silver fish 3. Mollusca
D. Bombay duck 4. Coelenterata
a)
A: 3, B: 4, C: 2, D: 1
b)
A: 3, B: 2, C: 4, D: 1
c)
A: 2, B: 3, C: 1, D:4
d)
A: 2, B: 1, C: 3, D: 4
|
|
Sagar Nair answered |
Octopus belongs to Mollusca. Jellyfish belongs to Coelenterata. Silver fish belongs to Arthropoda. Bombay Duck belongs to Pisces.
Consider the following statements and choose the correct ones.
1. Once the HIV gains a foothold, it can never be eradicated from the body.
2. Many HIV patients, however, can manage the infection with a cocktail of drugs.
3. It is very mutable and infects the respiratory system itself.- a)1 and 2 only
- b)2 and 3 only
- c)None
- d)All are correct
Correct answer is option 'A'. Can you explain this answer?
Consider the following statements and choose the correct ones.
1. Once the HIV gains a foothold, it can never be eradicated from the body.
2. Many HIV patients, however, can manage the infection with a cocktail of drugs.
3. It is very mutable and infects the respiratory system itself.
1. Once the HIV gains a foothold, it can never be eradicated from the body.
2. Many HIV patients, however, can manage the infection with a cocktail of drugs.
3. It is very mutable and infects the respiratory system itself.
a)
1 and 2 only
b)
2 and 3 only
c)
None
d)
All are correct
|
Isha Yadav answered |
Explanation:
1. HIV cannot be eradicated from the body:
- Once HIV gains a foothold in the body, it integrates itself into the DNA of immune cells, making it difficult to completely eradicate.
- This integration allows the virus to remain in the body for life, even with treatment.
2. Managing HIV with drugs:
- While HIV cannot be completely eliminated, many patients can manage the infection with antiretroviral therapy (ART).
- ART involves a combination of drugs that can suppress the virus, allowing patients to lead healthy lives and reduce the risk of transmission.
3. Mutability and respiratory system:
- HIV is indeed a highly mutable virus, which means it can quickly evolve and develop resistance to drugs.
- However, HIV primarily infects immune cells such as CD4 T cells and not the respiratory system itself.
Therefore, statements 1 and 2 are correct. HIV cannot be eradicated from the body, but with proper treatment, many patients can effectively manage the infection. Statement 3, on the other hand, is incorrect as HIV primarily targets immune cells and not the respiratory system.
What are the four whorls typically found in a flower?- a)Sepals, petals, stamens, carpels
- b)Leaves, stems, roots, fruits
- c)Calyx, corolla, androecium, gynoecium
- d)Xylem, phloem, cortex, pith
Correct answer is option 'A'. Can you explain this answer?
a)
Sepals, petals, stamens, carpels
b)
Leaves, stems, roots, fruits
c)
Calyx, corolla, androecium, gynoecium
d)
Xylem, phloem, cortex, pith
|
Capstone Ias Learning answered |
Flowers typically have four whorls: sepals, petals, stamens, and carpels. These whorls together make up the floral structure and are involved in the reproductive process.
Which plant group includes naked seeded plants with vascular tissues and is often considered a fossil group?- a)Bryophyta
- b)Gymnosperms
- c)Pteridophyta
- d)Angiosperms
Correct answer is option 'B'. Can you explain this answer?
a)
Bryophyta
b)
Gymnosperms
c)
Pteridophyta
d)
Angiosperms
|
|
Capstone Ias Learning answered |
Gymnosperms are a group of plants that produce naked seeds (seeds not enclosed in a fruit) and have well-developed vascular tissues. Gymnosperms are often considered a "fossil group" because they have ancient origins and include plants like conifers that have been around for a long time. The term "gymnosperm" means "naked seed," referring to the fact that the seeds are exposed on the surface of cone scales or other structures.
Match List-I with List-II and select the correct answer from the codes given below:
List-I List-II
A. Ptyalin 1. Converts angiotensinogen in blood into angiotensin
B. Pepsin 2. Digests starch
C. Renin 3. Digests proteins
D. Oxytocin 4. Hydrolyses fats
5. Induces contraction of smooth muscles- a)A: 2, B: 3, C: 1, D: 5
- b)A: 3, B: 4, C: 2, D: 5
- c)A:2, B: 3, C: 5, D: 1
- d)A:3, B: 1, C: 2, D: 4
Correct answer is option 'A'. Can you explain this answer?
Match List-I with List-II and select the correct answer from the codes given below:
List-I List-II
A. Ptyalin 1. Converts angiotensinogen in blood into angiotensin
B. Pepsin 2. Digests starch
C. Renin 3. Digests proteins
D. Oxytocin 4. Hydrolyses fats
5. Induces contraction of smooth muscles
List-I List-II
A. Ptyalin 1. Converts angiotensinogen in blood into angiotensin
B. Pepsin 2. Digests starch
C. Renin 3. Digests proteins
D. Oxytocin 4. Hydrolyses fats
5. Induces contraction of smooth muscles
a)
A: 2, B: 3, C: 1, D: 5
b)
A: 3, B: 4, C: 2, D: 5
c)
A:2, B: 3, C: 5, D: 1
d)
A:3, B: 1, C: 2, D: 4
|
|
Avik Chawla answered |
Ptyalin digests the starch in the mouth. Pepsin is a proteolytic enzyme which breaks down the proteins into simple peptides. Renin is responsible for converting angiotensinogen to angiotensin. Oxytocin is a hormone that stimulates the contraction of smooth muscles of the body.
Which method of artificial vegetative propagation involves the use of an individual bud with adjacent bark?- a)Cutting
- b)Budding
- c)Grafting
- d)Micropropagation
Correct answer is option 'B'. Can you explain this answer?
a)
Cutting
b)
Budding
c)
Grafting
d)
Micropropagation
|
Ias Masters answered |
Budding is a method of artificial vegetative propagation that involves the use of an individual bud with adjacent bark from one plant and inserting it into a cut made in the stock of another plant.
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
With reference to the work of human kidney, consider the following statements:
1. After the waste is removed in the kidney, the cleaner blood is sent back through renal artery.
2. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein.Q. Which of the statements is/are correct?- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
With reference to the work of human kidney, consider the following statements:
1. After the waste is removed in the kidney, the cleaner blood is sent back through renal artery.
2. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein.
1. After the waste is removed in the kidney, the cleaner blood is sent back through renal artery.
2. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein.
Q. Which of the statements is/are correct?
a)
1 only
b)
2 only
c)
Both 1 and 2
d)
Neither 1 nor 2
|
|
Ipsita Basak answered |
After the removal of wastes from the kidneys, the cleaner blood is sent back through the renal veins. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein.
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.
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.
What is the main difference between bacteria and viruses?- a)Bacteria have a nucleus, while viruses do not.
- b)Bacteria are larger than viruses.
- c)Bacteria can reproduce on their own, while viruses require a host.
- d)Bacteria are always harmful, while viruses can be beneficial.
Correct answer is option 'C'. Can you explain this answer?
a)
Bacteria have a nucleus, while viruses do not.
b)
Bacteria are larger than viruses.
c)
Bacteria can reproduce on their own, while viruses require a host.
d)
Bacteria are always harmful, while viruses can be beneficial.
|
K.L Institute answered |
Bacteria and viruses are both microorganisms, but one of the key differences between them is their ability to reproduce. Bacteria are single-celled organisms that can reproduce independently through binary fission, a form of asexual reproduction. In contrast, viruses are not considered living organisms and cannot reproduce on their own. Instead, viruses require a host cell to replicate and multiply. They inject their genetic material into a host cell and hijack the host's cellular machinery to make copies of themselves. This fundamental difference in reproduction is what sets bacteria and viruses apart.
Consider the following statements
Assertion (A): An enzyme is basically a protein which acts like a catalyst in the metabolic reactions of an organism.
Reason (R): The pancreatic juice is basically composed from three enzymes trypsin, amylase and lipase.- a)A and R are correct and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is true, but R is false.
- d)A is false, but R is true.
Correct answer is option 'B'. Can you explain this answer?
Consider the following statements
Assertion (A): An enzyme is basically a protein which acts like a catalyst in the metabolic reactions of an organism.
Reason (R): The pancreatic juice is basically composed from three enzymes trypsin, amylase and lipase.
Assertion (A): An enzyme is basically a protein which acts like a catalyst in the metabolic reactions of an organism.
Reason (R): The pancreatic juice is basically composed from three enzymes trypsin, amylase and lipase.
a)
A and R are correct and R is the correct explanation of A.
b)
Both A and R are true, but R is not the correct explanation of A.
c)
A is true, but R is false.
d)
A is false, but R is true.
|
|
Ipsita Bajaj answered |
An enzyme is basically a protein which acts like a catalyst in the metabolic reaction and the juice of the pancreas is basically composed from three enzymes trypsin, amylase and lipase.
Consider the following statements about Vechur cattle breed
1. Vechur is the world’s largest cow.
2. It is indigenous breed found in Kerala.
3. Its milk protein has medicinal value.
4. Commonly used in farming as draught animal.Q. Which of the statements given above are correct?- a)1, 2, 3 and 4
- b)1, 2 and 3
- c)2, 3 and 4
- d)3 and 4
Correct answer is option 'C'. Can you explain this answer?
Consider the following statements about Vechur cattle breed
1. Vechur is the world’s largest cow.
2. It is indigenous breed found in Kerala.
3. Its milk protein has medicinal value.
4. Commonly used in farming as draught animal.
1. Vechur is the world’s largest cow.
2. It is indigenous breed found in Kerala.
3. Its milk protein has medicinal value.
4. Commonly used in farming as draught animal.
Q. Which of the statements given above are correct?
a)
1, 2, 3 and 4
b)
1, 2 and 3
c)
2, 3 and 4
d)
3 and 4
|
|
Keerthana Kulkarni answered |
The Vechur cattle is a rare breed of Bos indicus, named after the village Vechoor in Kottayam district of the state of Kerala in India. Its average length is 124 cm and height is 87 cm, according to the Guineas Book of Records, it’s the smallest cattle breed in the world. Its milk is considered to have medicinal properties. Unlike other cattle, they can resist drought by being hardy towards it.
Chapter doubts & questions for Biology - Science & Technology for State PSC Exams 2025 is part of BPSC (Bihar) exam preparation. The chapters have been prepared according to the BPSC (Bihar) exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for BPSC (Bihar) 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Biology - Science & Technology for State PSC Exams in English & Hindi are available as part of BPSC (Bihar) exam.
Download more important topics, notes, lectures and mock test series for BPSC (Bihar) Exam by signing up for free.
Science & Technology for State PSC Exams
129 videos|566 docs|225 tests
|
|
© EduRev
|
Education Revolution
|
|
Signup on EduRev and stay on top of your study goals
10M+ students crushing their study goals daily