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The number of chromosomes in a secondary oocyte is


A) greater than the number in a mature sperm.
B) less than the number in a mature sperm.
C) the same as the number in a mature sperm.
D) greater than the number in a polar body.
E) less than the number in a polar body.

F) B) and C)
G) A) and E)

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From which primary germ layer is the epidermis of the skin derived?


A) Ectoderm
B) Mesoderm
C) Endoderm

D) All of the above
E) None of the above

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What is the feature that first signals gastrulation?


A) Invagination of cells from the epiblast occurs.
B) Folding of the embryonic disc occurs.
C) The yolk sac disappears.
D) The embryonic disc forms.
E) The primitive streak forms.

F) B) and D)
G) A) and D)

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What would happen if capacitation did not occur?


A) The egg (oogonium) would not mature.
B) Ejaculation could not occur.
C) The sperm could not reach the egg.
D) Ovulation could not occur.
E) Spermiogenesis would be impeded.

F) C) and D)
G) B) and E)

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