During phase I clinical trials, a new drug is tested ________
A) in an animal model
B) on fewer than 100 human volunteers
C) on a few hundred human volunteers
D) on thousands of human volunteers
B
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Respiratory distress syndrome is due to
a. a lack of surfactant in the lungs. b. premature birth. c. lack of prenatal care. d. a lack of surfactant in the lungs and premature birth. e. premature birth and lack of prenatal care.
Which of the following processes actually produces a significant quantity of ATP?
a. pyruvate oxidation b. glycolysis c. oxidative phosphorylation d. the citric acid cycle
Unlike a pedigree, a cladogram ______.
a. shows ancestry b. shows hypothesized phylogeny c. indicates ancestry from two parents d. explains relationships
All of the following are used in secondary sewage treatment EXCEPT
A) trickling filters. B) sludge granules or floc formation. C) aeration. D) anaerobic digestion. E) activated sludge.