問題詳情
13.tThe midpiece of a sperm cell is to
(A)tfuse with the jelly coat of the egg cell.
(B)tcarry the sperm，s nucleus.
(C)tcarry the sperm's acrosomal material.
(D)tgenerate fbe! that propels die sperm.
(E)tcarry enzymes that are released to form a hole in the egg's jelly coat when tiie sperm encounters an egg.
參考答案
答案：D
統計：A:0,B:0,C:0,D:1,E:2
難度：計算中