Imagine that you are trying to set up a large fish tank and want to select a colored light that will show off the fish to best advantage but will also allow the green plants in the tank to grow and stay healthy. You decide to measure the efficiency of photosynthesis by looking at the production of oxygen bubbles on the leaves (see Figure 7-5). At first, you use a white fluorescent lamp and see many oxygen bubbles on the leaves, indicating that photosynthesis is occurring normally. Next, you put a sheet of green cellophane between the white light and the water so that the light coming through to the tank appears green. Will the oxygen bubbles remain the same, increase, decrease, or disappear? Explain your answer.

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    The bubbles will decrease, because green light cannot be absorbed by chlorophyll.
    The bubbles will increase; because chlorophyll is green, photosynthesis will work best if leaves are exposed to green light.
    The bubbles will disappear, because photosynthesis cannot occur in green light.
    The bubbles will remain constant because photosynthesis can occur to some extent at all visible wavelengths of light.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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The bubbles will decrease, because green light cannot be absorbed by chlorophyll.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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