Question

write notes on abscissic acid​

Answer 1

Answer:

Abscissic acid(ABA).

Explanation:

ABA functions in many plants developmental processes including seed and bud dormancy,the control of organ siza and stomatal closure.

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Answer 2

Structural. In deciduous trees, an abscission zone, also called a separation zone, is formed at the base of the petiole. It is composed of a top layer that has cells with weak walls, and a bottom layer that expands in the autumn, breaking the weak walls of the cells in the top layer. This allows the leaf to be shed.