The ripening of fruit and the dropping of leaves and fruit are principally controlled by
A) auxins.
B) cytokinins.
C) indole acetic acid.
D) ethylene.
E) carbon dioxide concentration (in air).

Question

Quizplus · Accepted Answer

The ripening of fruit and the dropping of leaves and fruit are principally controlled by ethylene. Ethylene is a plant hormone that promotes ripening and aging processes in plants, including the ripening of fruit and the shedding of leaves and fruit.

The Ripening of Fruit and the Dropping of Leaves and Fruit