When you are scared or cold and turn pale it is because the ________ in your skin are constricting.
A. arteries
B. veins
C. capillaries
D. venules
E. arterioles
Answer: E
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During which of the following steps of the TCA cycle does substrate-level phosphorylation take place?
A) TCA-2 B) TCA-3 C) TCA-4 D) TCA-5 E) TCA-6
Four of the five answers are correct statements about materials in biogeochemical cycles. Select the exception
a. They pass from environmental reservoirs to living organisms. b. They move slower than elements in living systems move. c. They eventually move from living organisms back into environmental reservoirs. d. They may include rocks and sediments, waters, and atmosphere reservoirs. e. They are unidirectional, moving from the environment to living organisms.
In general, HPV causes
a. warts. b. pimples. c. moles. d. freckles. e. more than one of these.
Population ________ refers to the rate at which the number of individuals in a population increases or decreases with time
Fill in the blank(s) with correct word