Which condition is LEAST correlated with a decrease in atmospheric ozone?
a. more serious sunburns
b. loss of ocean phytoplankton
c. increased incidence of skin cancers
d. decreased levels of atmospheric carbon dioxide
e. increased occurrences of cataracts
ANSWER: d
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During fermentation, pyruvate is:
A. oxidized. B. reduced. C. phosphorylated. D. hydrogenated. E. carboxylated.
Which type of plant tissue is specialized for conducting fluids?
a. dermal tissue b. meristem c. protoderm d. vascular tissue
The plant hormone abscisic acid (ABA) is involved in the regulation of photorespiration. Based on this information, ABA likely plays a role in
A. the photoelectric effect. B. cyclic photophosphorylation. C. the opening and closing of stomata. D. noncyclic photophosphorylation.
DNA is negatively charged because of its
A) deoxyribose molecules. B) ribose molecules. C) phosphate groups. D) bases. E) large molecular size.