Question

Assertion : Auxins help to prevent fruits and leaves droo at early stages.
Reason : Auxins promote the abscission of older mature leaves and fruits.
A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer 1

Correct Answer - b
Auxin delays abscission of young leaves and fruits its effect is through nonformation of abscission zone below a leaf or fruit. Abscission zone cuts off nutrients and water supply. However, auxin promotes the abscission of mature or older leaves and fruits.