問題詳情
46. Xylem and phloem are two types of vascular tissues in plants. Which of the following statements is true?
(A) Xylem transports water and minerals upward, while phloem transports sugars downward.
(B) Xylem transports sugars downward, while phloem transports water and minerals upward.
(C)Both xylem and phloem transport water and minerals upward.
(D)Both xylem and phloem transport sugars downward.
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增