問題詳情

33. Botanist found that ethylene could induce triple response in pea seedlings. Which of the followingcharacteristics is not the effect caused by ethylene?
(A) a slowing of stem elongation
(B) a slowing of root elongation
(C) a curvature that causes stem to grow horizontally
(D) a thickening of the stem
(E) none of the above

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無參考答案

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