問題詳情
18. In a vascular plant, the least amount of resistance occurs as water moves between:
(A) tracheids through pit-pairs.
(B) tracheids through perforations.
(C)tracheids through plasmodesmata.
(D) vessel elements through pit-pairs.
(E) vessel elements through perforations.
參考答案
答案：99
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中