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Growth and Development in Plants MCQs for NEET — Botany Questions with Answers

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Which of the following is not true for flowering?

A. Only duration of dark period is important B. Certain plants depend not only on a combination of light and dark exposures but also their relative durations C. The site of perception for light or dark duration are the leaves D. There is a hormonal substance which migrates from leaves to shoot apices for inducing flowering only when the plants are exposed to the necessary inductive photoperiod.

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Explanation

Page number-252

15.5 Photoperiodism

Plant Growth and Development

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Flowering can be affected in certain plants

A. by quantitative exposure to low temperature B. by qualitative exposure to low temperature C. Both A and B D. It does not depend on low temperature exposure

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Explanation

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15.6 Vernalization

Plant Growth and Development

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Vernalisation prevents

A. Precocious reproductive development late in growing season B. Late reproductive development C. Flowering D. Fruiting

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Explanation

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15.6 Vernalisation

Plant Growth and Development

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Vernalisation

A. Disables the plant to have fruits B. Enables the plants to have fruits C. Enables the plants to have sufficient time to reach maturity D. Brings senescence

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Explanation

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15.6 Vernalisation

Plant Growth and Development

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Vernalisation refers to

A. The promotion of flowering by a period of high temperature B. The inhibition of flowering by a period of low temperature C. The promotion of flowering by a period of low temperature D. The inhibition of flowering by a period of high temperature

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Explanation

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15.6 Vernalisation

Plant Growth and Development

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Which of the following is not a reason of seed being dormant?

A. Impermeable and hard seed coat B. ABA C. Phenolic Acids, Para Ascorbic Acid D. External temperature

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Explanation

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15.7 Seed Dormancy

Plant Growth and Development

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Seed Dormancy

Find the incorrect statement.

A. Can be caused by immature embryos B. Can be overcome by natural means and various other man made measures C. ABA has no effects over seed Dormancy D. GA can overcome seed Dormancy

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Explanation

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15.7 Seed Dormancy

Plant Growth and Development

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Which of the following cannot overcome seed Dormancy?

A. GA B. Nitrates C. Changes in environmental Conditions D. Phenolic Acids

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Explanation

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15.7 Seed Dormancy

Plant Growth and Development

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Seed coat barrier in some seeds cannot be broken by

A. Vigorous shaking B. Mechanical abrasions using knives, sandpaper C. Chilling conditions D. Microbial action

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Explanation

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15.7 Seed Dormancy

Plant Growth and Development

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Effect of inhibitory substances cannot be removed by…..in order to overcome seed Dormancy.

A. Chilling conditions B. Application of GA C. Application of Nitrates D. Application of Para-ascorbic acid

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Explanation

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15.7 Seed Dormancy

Plant Growth and Development

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