30. Which plant hormone induces and maintains dormancy?
(A) gibberellins
(B) auxins
(C) cytokinins
(D) abscisic acid
(E) phytochrome
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統計: A(5), B(3), C(6), D(37), E(2) #2238503
統計: A(5), B(3), C(6), D(37), E(2) #2238503