AP BIOLOGY

Detailed explanation-1: -Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light. That particular light wavelength is reflected from the plant, so it appears green.

Detailed explanation-2: -Chlorophylls are green in color and have mechanism to absorb 400 and 700 nm wavelength from white visible light. Violet colored leaves containing anthocyanin pigments are also present. These absorb light energy of other wavelengths but pass it on to chlorophyll for the ultimate photosynthetic reaction.

Detailed explanation-3: -Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects. This is why plants appear green to us.

Detailed explanation-4: -The colours of visible light form a colour wheel. Within that wheel the colour an object appears to be is the colour complementary to the one it most strongly absorbs. As such, plants look green because they absorb red light most efficiently and the green light is reflected.

Detailed explanation-5: -For instance, plants appear green to us because they contain many chlorophyll a and b molecules, which reflect green light.