Question

Abscission is restricted to

• A. Morphologically distinct region
• B. Anatomically distinct region
• C. Both A and B
• D. Abscission is not restricted to any region

Answer 1

Answer: (B)

Anatomically distinct region

Ageing is the result of a sequential switching on and off of certain genes which result in senescence. Abscission is the stage when there is falling off the parts of the plants due to ageing. The parts of the plants turn yellow and then there is the breaking of the tissue or organ from the plant part. The abscission occurs in anatomically distinct parts of the plants like the petiole or the peduncle. Ethylene causes the abscission of the old leaves and the ripe fruits.

Thus, the correct answer is option B.