Plant Growth and Development Question 3

3. Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in

[2008]

(a) vessels and tracheid differentiation

(b) leaf abscission

(c) annual plants

(d) floral parts

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Answer : b

Hints & Solutions

(b) Senescence is an active developmental cellular process in the growth and functioning of a flowering plant, indicated in lead abscission. Senescence is the changes that occur in an organism between maturity and death, i.e., ageing. Characteristically there is a deterioration in functioning as the cells become less efficient in maintaining and replacing vital cells components.