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NEET • BIOLOGY • PLANT GROWTH AND DEVELOPMENT

Plant growth and development practice · Medium

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Showing 91-107 of 107 questions

91 Medium

91 of 107

Analyzing +4 | -1

Assertion: Flowering depends only on a
combination of light and dark exposure in some
plants.

Reason: The site of perception of light or dark
duration are the shoot apices of plants.

View answer and explanation

Correct option: D

If both Assertion and Reason are false

The correct answer is D (If both Assertion and Reason are false) because flowering depends on more than just light and dark exposure (temperature, hormones), and the site of perception is the leaves, not the shoot apices.

92 Medium

92 of 107

Remembering +4 | -1

Environment heterophylly is seen in

View answer and explanation

Correct option: D

Buttercup

Option D (Buttercup) is correct because buttercup exhibits environment heterophylly, showing different leaf forms in aquatic and terrestrial environments.

93 Medium

93 of 107

Remembering +4 | -1

Intrinsic heterophylly is found in all except?

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Correct option: B

Buttercup

Option B (Buttercup) is correct because buttercup exhibits heterophylly due to environmental factors, not intrinsic factors.

94 Medium

94 of 107

Remembering +4 | -1

Name the process when dedifferentiated cells again loss the ability to divide and get mature?

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Correct option: B

Redifferentiation

Option B (Redifferentiation) is correct because redifferentiation is the process where dedifferentiated cells lose the ability to divide and become mature.

95 Medium

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Understanding +4 | -1

During differentiation, the cells undergo few to major structural changes in their

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Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because during differentiation, cells undergo structural changes in both the cell wall and protoplasm.

96 Medium

96 of 107

Understanding +4 | -1

Cells in the meristematic phase exhibits all of the given characteristics, except

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Correct option: D

Increased vacuolation

Option D (Increased vacuolation) is correct because cells in the meristematic phase typically have small vacuoles, not increased vacuolation.

97 Medium

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Understanding +4 | -1

How does pruning help in making the hedge dense?

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Correct option: B

It frees axillary buds from apical dominance

Option B is correct because pruning removes the apical bud, which is the source of apical dominance, allowing the axillary buds to grow and make the hedge dense.

98 Medium

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Remembering +4 | -1

Parthenocarpy in tomatoes is induced by

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Correct option: B

Auxin

Option B (Auxin) is correct because auxin application can induce parthenocarpy (fruit development without fertilization) in tomatoes, leading to seedless fruit production.

99 Medium

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Analyzing +4 | -1

Compare the statement I and II and choose the correct option.

Statement I: In the flowering plants due to higher accumulation of auxins
dormancy of lateral buds occurs.

Statement II: In Maryland Mammoth (a tobacco variety) flowering occurred
at different time at different latitude due to gibberellins
concentration.

View answer and explanation

Correct option: A

Statement I is true, but II is false

Option A is correct because high auxin levels promote apical dominance, inhibiting lateral bud growth, while the flowering time of Maryland Mammoth is affected by photoperiod, not gibberellin concentration.

100 Medium

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Remembering +4 | -1

Heterophyllous development due to environment is seen in

View answer and explanation

Correct option: D

Buttercup

Option D (Buttercup) is correct because buttercup exhibits heterophyllous development due to environmental factors, showing different leaf forms in aquatic and terrestrial environments.

101 Medium

101 of 107

Remembering +4 | -1

The hormone involved in metabolism of food material in cereal grains during germination is

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Correct option: C

Gibberellin

Option C (Gibberellin) is correct because gibberellins stimulate the production of amylase, which breaks down starch into sugars, providing energy for germination in cereal grains.

102 Medium

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Remembering +4 | -1

In some plants, the leaves of the juvenile plants are different in shape from those in mature plants. This is the heterophylly due to phases of life seen in

View answer and explanation

Correct option: D

Cotton, coriander and larkspur

Option D (Cotton, coriander and larkspur) is correct because these plants show heterophylly due to different phases of life.

103 Medium

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Application +4 | -1

A primary root grows from 5 cm to 19 cm in a week calculate the actual growth rate (AGR) and relative growth rate (RGR) over the period?

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Correct option: A

\begin{array}{cccccccccccccccccccc} {AGR}&{RGR}\\ {14\,cm}&{2.8} \end{array}

Option A (AGR = 14 cm, RGR = 2.8) is correct because the actual growth rate is the difference in length, and the relative growth rate is the ratio of the final length to the initial length.

104 Medium

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Understanding +4 | -1

Phase of maturation is characterised by
I. Cells attaining their maximal size
II. Proper wall thickening and protoplasmic modification
III. Rapid cell division
Select the correct option

View answer and explanation

Correct option: A

I and II

Option A (I and II) is correct because the phase of maturation is characterized by cells reaching their maximal size and undergoing wall thickening and protoplasmic modification.

105 Medium

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Understanding +4 | -1

Constantly dividing cells, both at the root apex and shoot apex represents

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Correct option: B

Meristematic phase of the growth

Option B (Meristematic phase of the growth) is correct because constantly dividing cells are characteristic of meristematic tissue, which is found at the root and shoot apices.

Explore Other Chapters in BIOLOGY

View All →

ANIMAL KINGDOM 756 MCQs PLANT KINGDOM 415 MCQs ANATOMY OF FLOWERING PLANTS 404 MCQs MOLECULAR BASIS OF INHERITANCE 404 MCQs CHEMICAL COORDINATION AND INTEGRATION 387 MCQs PRINCIPLE OF INHERITANCE AND VARIATION 374 MCQs

106 Medium

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Remembering +4 | -1

Plant hormone which induce the seed germination is

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Correct option: A

Option A (GA) is correct because Gibberellic acid (GA) promotes seed germination by breaking seed dormancy.

107 Medium

107 of 107

Understanding +4 | -1

In plants, growth can be measured by using all of the following parameters, except

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Correct option: C

Increase in respiration rate

Option C (Increase in respiration rate) is correct because while respiration rate is related to growth, it is not a direct measurement of growth like the other options.

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