Introduction to Photosynthesis

Problem 4: Pigments and Light

Your friend asks "Why are plants green?" You reply, "Plants contain chlorophyll, a green pigment which ______."

A.

absorbs all colors of light

B.

reflects all colors of light

C.

reflects green light and absorbs other colors

The color of a pigments comes from the wavelengths of light reflected (in other words, those not absorbed. Chlorophyll absorbs all wavelengths of visible light except green.

D.

reflects red light and absorbs other colors

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The Biology Project
The University of Arizona
December 4, 2001
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