A plant mutant that showed normal gravitropic bending but did not store starch in its plastids would require a reevaluation of the role of ________ in gravitropism.
A) auxin
B) statoliths
C) light
D) differential growth

Question

Quizplus · Accepted Answer

Statoliths are specialized plastids that contain starch grains and play a critical role in the perception of gravity by plants. If a plant mutant showed normal gravitropic bending but did not store starch in its plastids, this would suggest that starch-containing plastids are not necessary for the perception of gravity and that another mechanism, possibly involving different types of plastids, may be involved. Therefore, a reevaluation of the role of statoliths in gravitropism would be necessary.

A Plant Mutant That Showed Normal Gravitropic Bending but Did