Lipid-soluble molecules would be expected to cross the cytoplasmic membrane by which of the following processes?
A. osmosis
B. facilitated diffusion
C. diffusion
D. active transport
E. group translocation
Answer: C
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Which of the following are living representatives of the first plant lineages to diverge after plants moved onto land?
A. angiosperms B. gymnosperms C. ferns D. bryophytes E. lycophytes
The single most important measure to prevent the spread of disease is
A. home cooking. B. canning. C. pasteurization. D. hand washing.
Why is it important to include a placebo in a scientific study to assess the effectiveness of a drug?
A. It's actually unethical to do so-if you have a drug that you know to be effective, it's unethical to withhold that treatment from an ill patient. B. A placebo-treated group will determine if the changes observed in the drug-treated illness group are due to a psychological effect rather than a physiologic/pharmacologic one. C. It isn't scientifically important-a placebo simply helps investigators satisfy the legal requirements of the Food and Drug Administration in their testing process. D. A placebo-treated group will determine if the changes observed in the illness in this non-treated group are due to a physiologic/pharmacologic effect rather than a psychological one.
The most common cancer of the eye is
a. retinoblastoma. b. scleral sarcoma. c. malignant melanoma. d. rhabdomyosarcoma. e. lymphoma.