Which of the following plant pigments absorbs in red and far-red region of light?

A. Phytochrome

B. Cryptochrome

C. Carotenoids

D. Chlorophyll

Ans. (A) Phytochrome

Explanation:

Phytochrome is a phooreceptor, a pigment that plants use to detect light. It is a protein with a bilin chromophore. 

Main Roles of Phytochrome:

• Detect mainly red and far-red region of the visible spectrum.
• Regulates germination of seeds.
• Shade avoidance.