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

Question

Quizplus · Accepted Answer

Statoliths, which are starch-containing plastids, have been thought to play a crucial role in sensing gravity due to their density. A plant that does not store starch in its plastids but still shows normal gravitropic bending suggests that the role of statoliths in gravitropism needs to be reevaluated, as it indicates that starch may not be as critical for gravity sensing as previously thought.

A Plant Mutant That Shows Normal Gravitropic Bending but Does