Class XI · Biology practice
Plant Growth and Development PYQs Check your understanding, bookmark questions and revisit your mistakes.
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22 questions in this collection · Page 1 of 3
Plant Growth And Development
Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that
leads to early seed production?
A Abscisic Acid B Indole-3-butyric Acid C Gibberellic Acid D Zeatin
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Plant Growth And Development
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
A Senescence B Differentiation C Dedifferentiation D Development
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Plant Growth And Development
Production of Cucumber has increased manifold in recent years. Application of which of the following
phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in
the plants :
A ABA B Gibberellin C Ethylene D Cytokinin
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Plant Growth And Development
Which one of the following plants does not show plasticity?
A Cotton B Coriander C Buttercup D Maize
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Plant Growth And Development
The gaseous plant growth regulator is used in plants to:
A speed up the malting process
B promote root growth and root hair formation to increase the absorption surface C help overcome apical dominance D kill dicotyledonous weeds in the fields
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Plant Growth And Development
The site of perception of light in plants during
photoperiodism is:
A Shoot apex B Stem C Axillary bud D Leaf
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Plant Growth And Development
The plant hormone used to destroy weeds in a field
is:
A IAA B NAA C 2,4-D D IBA
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Plant Growth And Development
Plants follow different pathways in response to
environment or phases of life to form different kinds of structures. This ability is called:
A Elasticity B Flexibility C Plasticity D Maturity
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Plant Growth And Development
Inhibitory substances in dormant seeds cannot be
removed by subjecting seeds to:
A Gibberellic acid B Nitrate C Ascorbic acid D Chilling conditions
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Plant Growth And Development
Match the following concerning the activity/function and the phytohormone involved:
(A)Fruit ripener
(I)Abscisic acid
(B)Herbicide
(II)GA3
(C)Bolting agent
(III)2, 4-D
(D)Stress hormone
(IV)Ethephon
Select the correct option from following:
A (A)-(II), (B)-(III), (C)-(IV), (D)-(I) B (A)-(III), (B)-(IV), (C)-(II), (D)-(I) C (A)-(IV), (B)-(III), (C)-(II), (D)-(I) D (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
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