Nonphotosynthetic plant pigments that absorb red light and far-red light providing light input into internal circadian "clocks" are called ____.

A) flavonoids
B) statoliths
C) amyloplasts
D) phytochromes
E) flagellins

Phytochromes

A type of photoreceptor in plants that absorbs light to regulate growth, development, and flowering in response to environmental conditions.

Nonphotosynthetic

Organisms or cells that do not have the ability to convert light energy into chemical energy through photosynthesis.

Pigments

Substances that give color to tissues, cells, and materials by absorbing certain wavelengths of light and reflecting others.