Which type of vessel is one cell layer in thickness?
a. artery
b. arteriole
c. capillary
d. venule
e. vein
ANSWER: c
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An elephant and a mouse are running in full sunlight, and both overheat by the same amount above their normal body temperatures. When they move into the shade and rest, which animal will cool down faster?
A) The elephant will because it has the higher surface-area-to-volume ratio. B) The elephant will because it has the lower surface-area-to-volume ratio. C) The mouse will because it has the higher surface-area-to-volume ratio. D) They will cool at the same rate because they overheated by the same amount.
If you wanted to prevent a regulatory protein from changing gene expression, you would have to prevent physical contact between the protein and _____
A) ribosomes B) DNA C) ribozymes D) mRNA
Parasites reduce the reproductive rate of host individuals primarily by ____
a. killing the hosts b. preventing reproduction c. tricking them into caring for their young d. withdrawing nutrients from them e. acting as imposters
A cellular structure found in plant but not animal cells is the:a
chloroplast. b. ribosome. c. endoplasmic reticulum. d. microtubule. e. microfilament.