Semen contains
a. sperm.
b. the secretions of sex accessory glands.
c. eggs.
d. both a and b.
c
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The most recent common ancestor of a bird and a turtle is also the most recent common ancestor of a bird and which other group?
A. snake B. human C. crocodile D. frog E. None of the of the answer options is correct.
During spring time in Maine, male moose often enter a cow pasture and begin calling to the female cows. The moose may even try to mount the female but the male genitalia do not fit properly inside the female genitalia. This is an example of
A. mechanical isolation. B. temporal isolation. C. habitat isolation. D. behavioral isolation. E. gametic isolation.
Bile contains salts, pigments, lipids and ____
a. enzymes b. bicarbonate c. cholesterol d. lipase e. hydrochloric acid
It contains cholinergic neurons?
A. True only for the sympathetic division B. True only for the parasympathetic division C. True for both divisions