Complement:
a. consists of a group of protein molecules
b. is activated by antibodies
c. is usually found in an inactive form in the blood
d. all of the above
d. all of the above
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What will be an ideal response?
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Which is TRUE about sperm delivery?
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Mr. Smith moved from a low altitude to a high altitude and experienced an increase in RBCs. Which of the following caused this increase?
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