阿摩線上測驗
4. A plant produces a guard cell hormone under water-deficit conditions. Most likely the hormone is _____.
(A) 2, 4-D
(B) gibberellin
(C) IAA
(D) abscisic acid
(E) ethylene
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統計： A(2), B(1), C(10), D(88), E(3) #938244
統計： A(2), B(1), C(10), D(88), E(3) #938244