Guard cells
a. surround the stoma.
b. control the flow of gases between the interior of
a leaf and the atmosphere.
c. become turgid when it becomes light if
environmental conditions are not too hot or too
dry.
d. may absorb water from surrounding epidermal
cells.
e. do all of these.
Answer: e
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a. alcohols or amino acids; two fatty-acid tails b. glycoproteins; one fatty-acid tail c. two fatty-acid tails; sterols
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During prokaryotic cell division, two chromosomes separate and are distributed to the two ends of the
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a. true b. false