During germination,the stem grows upward and | vedclass

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(B) The growth response of plants to gravity is known as gravitropism. Auxins are plant hormones that play a crucial role in this process. In roots,a

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Of auxin

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(B) The growth response of plants to gravity is known as gravitropism. Auxins are plant hormones that play a crucial role in this process. In roots,a high concentration of auxin inhibits cell elongation,causing the root to grow downward (positive gravitropism). In stems,a high concentration of auxin promotes cell elongation,causing the stem to grow upward (negative gravitropism). Therefore,the differential distribution and effect of auxin are responsible for the directional growth of the stem and root during germination.

During germination,the stem grows upward and the root grows downward because:

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