Question

ch. 7 quiz (due by 10/25) (webcam) (yuja verity for test proctoring)
started oct 26 at 12:48pm
quiz instructions
(see directions above - review on 10/26)
question 4
1 pts
the wavelengths (colors) of light that we see when we look at a leaf are those that are
__________ by leaf pigments.
oxidized
reduced
absorbed
energized
reflected

Explanation:

Plants have pigments like chlorophyll. Chlorophyll absorbs most wavelengths of light (such as red and blue light) for photosynthesis but reflects green - wavelength light. So the color we see (the reflected light) is the wavelength that is not absorbed by the leaf pigments. Oxidized and reduced are terms related to redox reactions (gain or loss of electrons) which are not relevant here. Energized is a state (like electrons being in an excited state after absorption) but not the reason for the color we see. Absorbed light is used in processes like photosynthesis and is not what we see.

Answer:

reflected