15. Which one of the following signal molecule is specific to animals?
(A) Pheromone
(B) Cytokinin
(C) Ethylene
(D) Strigolactone
(E) Nitric oxide
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統計: A(121), B(7), C(1), D(2), E(15) #2349810
統計: A(121), B(7), C(1), D(2), E(15) #2349810