Which statement best describes the Bruce effect?
A) Group-housed female mice show slower estrous cycles.
B) Spontaneous abortion in female mice is noted after exposure to the odor of a novel male.
C) Group-housed female mice show a faster estrous cycle.
D) Estrous cycles of group-housed female mice are synchronized after exposure to the odor of an intact male mouse.
E) The odor of a male mouse accelerates the onset of puberty in a female mouse.
Answer: B
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