The function of a sperm cell's acrosome is to
A) carry the sperm's nucleus.
B) fuse with the jelly coat of the egg cell.
C) provide enzymes that help the sperm penetrate the egg.
D) provide the fuel that powers the sperm.
Answer: C
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You have before you a living organism, which you examine carefully. Which of the following should convince you that the organism is acoelomate?
A) It is triploblastic. B) It has bilateral symmetry. C) It possesses sensory structures at its anterior end. D) Muscular activity of its digestive system distorts the body wall.
In a family that starts with you, your grandchildren would be the ________ generation.
A) P1 B) P2 C) F1 D) F2
Lactation is stimulated by the hormone LH.
a. true b. false
Which of the following is NOT a mechanism of genetic change in populations?
a) genetic drift b) mutation c) natural selection d) biogeography e) migration