The medulla of the kidney secretes epinephrine.

a. true
b. false


Ans: b. false

Biology & Microbiology

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In 2003, the majority of AIDS deaths occurred in

A) South America. B) North America. C) Europe. D) Sub-Saharan Africa.

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The epithelial cells in the skin of an animal have 24 chromosomes. How many chromosomes are present in the gametes of this animal?

A. 6 B. 12 C. 24 D. 48

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One hypothesis proposes that an asteroid impact at the end of the ___________ led to the extinction of dinosaurs. Fill in the blank(s) with the appropriate word(s)

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Cell proliferation in culture is normally limited by

A) cytophagy. B) quorum sensing. C) contact inhibition. D) competition. E) nutrient limitation.

Biology & Microbiology