Which of the following describes the mechanism by which a plant stem grows toward light?AThe plant seeks light in order to maximize photosynthesis.BNervelike impulses stimulate contractile cells on the lighted side of the stem.CCells on the dark side of the stem elongate more than those on the lighted side.DThe plant grows into an open area where its leaves will not be shaded by competing plants.EThe greater energy supply on the lighted side of the stem stimulates metabolism and growth on that side.

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