A) wilting
B) abscission
C) plasmolysis
D) senescence
Correct Answer: D
Solution :
Senescence (L. senescene-to grow old) is the state of an organism when it undergoes deterioration of structural and functional efficiency due to increase in metabolic failure, decreased homeostasis, increase in entropy and cellular breakdown. It is a consequence of ageing and will occur even optimum nutrition level is maintained. The study of plant senescence is called Phytogerontology.
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