複選題
21. If a long-day plant has a critical night length of 11 hours, which of the 24-hour cycles would prevent flowering?
(A) 16 hours light/8 hours dark
(B) 12 hours light/12 hours dark
(C) 15 hours light/9 hours dark
(D) 4 hours light/8 hours dark/4 hours light/8 hours dark
(E) 8 hours light/8 hours dark/light flash/8 hours dark
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統計: A(1), B(0), C(1), D(0), E(0) #3386962
統計: A(1), B(0), C(1), D(0), E(0) #3386962