Q1Multiple choice
Ethylene is used for
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Correct option: B
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Ans: (b) Hastening the ripening of fruits
NCERT Exemplar · Class 11 · Biology
Chapter 15: Plant Growth and Development
Practice each question, then open the answer or worked solution.
Multiple Choice Questions
12 questionsQ2Multiple choice
Coconut water contains
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Correct option: C
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Ans: (c) Cytokinin
Q3Multiple choice
The affect of apical dominance can be overcome by which of the following hormone:
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Correct option: D
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Ans: (d) Cytokinin
Q4Written answer
Match the following:
Column I | Column II |
A. IAA | (i) Herring sperm DNA |
B. ABA | (ii) Bolting |
C. Ethylene | (iii) Stomatal closure |
D. GA | (iv) Weed-free lawns |
E. Cytokinins | (v) Ripening of fruits |
Options:
a. A – (iv), B – (iii), C – (v), D – (ii), E – (i)
b. A – (v), B – (iii), C – (iv), D – (ii), E – (i)
c. A – (iv), B – (i), C – (v), D – (iii), E – (ii)
d. A – (v), B – (iii), C – (ii), D – (i), E – (iv)
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Ans: (a) A – (iv), B – (iii), C – (v), D – (ii), E – (i)
Q5Multiple choice
Apples are generally wrapped in waxed paper to
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Correct option: B
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Ans: (b) Prevent aerobic respiration by checking the entry of \[{O_2}\]
Explanation: The rotting of the apple will be hastened by aerobic respiration.
Q6Multiple choice
Growth can be measured in various ways. Which of these can be used as parameters to measure growth
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Correct option: D
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Ans: (d) All the above
Q7Multiple choice
The term synergistic action of hormones refers to
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Correct option: B
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Ans: (b) When two hormones act together and contribute to the same function
Q8Multiple choice
Plasticity in plant growth means that
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Correct option: B
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Ans: (b) Plant development is dependent on the environment.
Q9Multiple choice
To increase sugar production in sugarcanes, they are sprayed with
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Correct option: C
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Ans: (c) Gibberellin
Explanation: Gibberellin lengthens the stem, increasing the quantity of sugar in the sugarcane.
Q10Multiple choice
ABA acts antagonistic to
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Correct option: C
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Ans: (c) Gibberellic acid
Explanation: ABA has a growth inhibitory effect. Gibberellin, on the other hand, encourages growth.