At the root apex the cells of the meristematic region are not characterized by:-

1. Being rich in protoplasm
2. Abundant plasmodesmatal connections
3. A cell wall that is primary in nature
4. Having small inconspicuous nuclei

Subtopic:  Growth |
 75%
From NCERT
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The growth of a root elongating at a constant rate will be represented by:

1. A only

2. B only

3. Both A and B

4. Neither A nor B

Subtopic:  Growth |
 76%
From NCERT
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Consider the following statements regarding growth in plants -

I: Cell enlargement requires water.
II: Oxygen helps in releasing metabolic energy for growth activities.
III: Nutrients are required for synthesis of protoplasm and act as source of energy.

Which of the above statements are true?

1. I and II only            2. I and III only
3. II and III only        4. I, II, and III
Subtopic:  Growth |
 87%
From NCERT
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Growth can be measured in various ways. Which of these can be used as parameters to measure growth?

1. increase in cell number

2. increase in cell size

3. increase in length and weight

4. All of these

Subtopic:  Growth |
 98%
From NCERT
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Apples are generally wrapped in waxed paper to

1. prevent sunlight for changing its colour
2. prevent aerobic respiration by checking the entry of oxygen
3. prevent ethylene formation due to injury
4. makes the apples look attractive

Subtopic:  Aerobic Respiration |
 58%
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The typical growth curve in plants is:

1. sigmoid
2. linear
3. stair-steps shaped
4. parabolic
Subtopic:  Growth Model |
 87%
From NCERT
NEET - 2015
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Heterophyllous development due to environment is an example of:-

1. Developmental noise
2. Norm of the reaction
3. Convergence
4. Plasticity

Subtopic:  Development |
 94%
From NCERT
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Plasticity in plant growth means that

1. plant roots are extensible

2. plant development is dependent on the environment

3. stems can extend

4. None of the above

Subtopic:  Development |
 91%
From NCERT
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Auxin was isolated by

1.F. W. Went

2.Charles Darwin

3.Francis Darwin

4.F. Skoog

Subtopic:  Growth Hormones & Auxin |
 92%
From NCERT
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This picture suggests that

1.Tip of the coleorrhiza is the source of Auxin

2.Tip of coleoptile is the source of Auxin

3.Base of coleoptile is the source of Auxin

4.Base of coleorrhiza is the source of Auxin

Subtopic:  Growth Hormones & Auxin |
 92%
From NCERT
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