Which of the Following Best Describes Positive Gravitropism Exhibited by Plant

question 48

Multiple Choice

Which of the following best describes positive gravitropism exhibited by plant roots?

• A) It is mediated by auxin similar to the phototropism responses in shoots.
• B) It depends on an inhibition of elongation of some cells.
• C) Gravity causes gibberellins to accumulate on the lower side of roots.
• D) The phenomenon depends upon inhibition of cell elongation of certain root cells by abscisic acid.
• E) All of the above are correct.

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