What is the function of the chorion?

a. to absorb shock
b. to form blood cells
c. to provide nourishment
d. to permit freedom of movement
e. to permit gas exchange


E

Biology & Microbiology

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In the Northern Hemisphere, seasonal variation in temperatures is caused mainly by ____

a. the Earth's elliptical orbit taking it closer to and farther away from the sun b. the Earth's tilt on its axis of 23.5

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The joint between vertebrae is an example of a ____ joint

a. cartilaginous b. synovial c. fibrous d. spongy e. intervertebral

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Each enzyme has a particular substrate because enzymes

A. have active sites complementary in shape to their substrates. B. are named for their substrate. C. decrease the productivity of the cell. D. always require coenzymes. E. increase the energy of activation.

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Identify the three suborders of primates and list one to two representatives of each. What will be an ideal response?

Biology & Microbiology