CBSE - Class 11 Biology Plant Growth and Development Worksheet
1.
What would be expected to happen if: (c) a rotten fruit gets mixed with unripe fruits
2.
Which one of the plant growth regulators would you use if you are asked to: (f) induce immediate stomatal closure in leaves.
3.
Describe briefly: (b) Geometric growth
4.
What would be expected to happen if: (d) you forget to add cytokinin to the culture medium.
5.
Describe briefly: (d) Absolute and relative growth rates
6.
Would a defoliated plant respond to photoperiodic cycle? Why?
7.
Describe briefly: (c) Sigmoid growth curve
8.
‘Both growth and differentiation in higher plants are open’. Comment.
9.
Describe briefly: (a) Arithmetic growth
10.
‘Both a short day plant and a long day plant can produce can flower simultaneously in a given place’. Explain.
11.
Which one of the plant growth regulators would you use if you are asked to: (d) induce growth in axillary buds
12.
Which one of the plant growth regulators would you use if you are asked to: (c) delay leaf senescence
13.
Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?
14.
Why is abscisic acid also known as stress hormone?
15.
List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.
16.
What would be expected to happen if: (a) $GA_3$ is applied to rice seedlings
17.
Which one of the plant growth regulators would you use if you are asked to: (a) induce rooting in a twig
18.
What would be expected to happen if: (b) dividing cells stop differentiating
19.
Which one of the plant growth regulators would you use if you are asked to: (b) quickly ripen a fruit
