A Plant's Tendency to Grow Toward a Source of Light

Question

A plant's tendency to grow toward a source of light is called
A) phototropism.
B) lumitropism.
C) gravitropism.
D) amylotropism.
E) thigmotropism.

Accepted Answer

Phototropism is the correct term for a plant's tendency to grow towards a source of light. Lumitropism is not a commonly used scientific term, while gravitropism refers to a plant's growth response to gravity, not light. Amylotropism is not a valid term in plant biology, and thigmotropism refers to a plant's response to touch or physical contact.