18. Sperm-containing enzymes are required to digest the egg's jelly coat during fertilization. Where are those enzymes stored in a sperm?
(A) Plasma membrane
(B) acrosome
(C) middle piece
(D) head cytosol
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統計: A(0), B(3), C(0), D(2), E(0) #3411502
統計: A(0), B(3), C(0), D(2), E(0) #3411502