問題詳情
40. Plants often use changes in day length (photoperiod) to trigger events such as dormancy andflowering. It is logical that plants have evolved this mechanism because photoperiod changes
(A) are more predictable than air temperature changes.
(B) alter the amount of energy available to the plant.
(C) are modified by soil temperature changes.
(D) can reset the biological clock.
(E) are correlated with moisture availability.
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增