If a mutant plant were created that lacked the receptor for ethylene,its leaves would
A) not expand as much as wild-type leaves.
B) be unable to turn green in the spring.
C) produce excess cytokinins to compensate for the missing ethylene response.
D) be unable to undergo abscission in the fall.
E) None of the above

Question

Quizplus · Accepted Answer

Ethylene is responsible for triggering the process of abscission, which causes leaves to fall off in the fall. If the plant lacks the receptor for ethylene, it would be unable to undergo abscission in the fall. Therefore, option D is the best choice. Option A is not related to ethylene receptor, option B is related to chlorophyll rather than ethylene, and option C is not a known compensatory response to the lack of ethylene receptor.

If a Mutant Plant Were Created That Lacked the Receptor