Many cacti, such as saguaros and barrel cacti, have large stems and no leaves. What function of leaves is taken on by the stems of such cacti?
A. They produce food by photosynthesis.
B. They absorb water and nutrients from the soil.
C. They transport materials throughout the plant.
D. They store excess water.
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A. The stems themselves do not do the photosynthesizing; rather, it is a reaction involving the chlorophyll on the surface of the plant. A very distracting option.
B. In cacti and other plants, water collection is done through the roots, not the stem. Another distractor.
C. Possible, but refers to a smaller component within the framework of the plant, not overall stems of cacti.
D. Cacti like those store water in their large, barrel-like stems, as a storehold to conserve and save water in the arid desert.
I hope that helps~
its not D
B,They produce food by photosynthesis. The function of leaves is taken on by stems of such cacti.