In autumn, many trees shed their leaves and change color. Which explains the reason for this behavior?

A) in autumn,the amount of ethylene decreases,rendering the cells of the abscission layer more sensitive to auxin.

B) in autumn the amount of auxin decreases rendering the cells of the abscission layer more sensitive to ethylene.

C) in autumn the amount of gibberellins decreases rendering the cells of the abscission layer more sensitive to auxin.

Answer:

The answer is B) in autumn the amount of auxin decreases rendering the cells of the abscission layer more sensitive to ethylene.

That is the answer In autumn, many trees shed their leaves and change color. Which explains the reason for this behavior?

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