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Would a defoliated plant respond to photoperiodic cycle ? Why ?


No, a defoliated plant will not respond to photoperiodic cycle or stimulus. The photoperiodic is perceived by leaves as, the site of perception of light/dark duration are the leaves, which have been removed in a defoliated plant.
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 “Both a short day plant and a long day plant can produce flower simultaneously in a given place.” Explain.

What do you understand by photoperiodism and vernalisation ? Describe their significance.

What would be expected to happen if :

(a) GA3 is applied to rice seedlings.

(b) Dividing cells stop differentiating.

(c) A rotten fruit gets mixed with urripe fruits.

(d) You forget to add cytokinin to the culture medium


Which one of the plant growth regulators would you use if you are asked to :

(a) Induce rooting in a twig
(b) quickly ripen a fruit
(c) delay leaf senescence
(d) induce growth in axilliary buds
(e) ‘bolt’ a rosestte plant.
(f) induce immediate stomatal closure in leaves.


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