In lower animals, _____ is caused by a release of the female sex hormone into the bloodstream, making the female receptive to having sex.
A)mensis
B)estrus
C)menopause
D)androgyny

Question

Quizplus · Accepted Answer

Estrus refers to the period of sexual receptivity in female animals, which is triggered by the release of the female hormone estrogen. Menstruation (option A) refers to the shedding of the lining of the uterus in female primates and some other mammals, and is not directly related to sexual receptivity. Menopause (option C) refers to the cessation of menstruation and fertility in older women, and is not relevant to lower animals. Androgyny (option D) refers to a lack of clear male or female physical characteristics, which is also not relevant to the question.

In Lower Animals, _____ Is Caused by a Release of the Female