Sperm become functional when ________
A) the tail disappears
B) capacitation occurs
C) they become spermatids
D) stored in the uterus for several days
B
Explanation:
A) The tail of the sperm does not disappear.
C) Spermatids are a result of spermatogenesis.
D) Sperm are functional as soon as they enter the uterus.
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