All steroids have ____
a. the same number of double bonds
b. one or more fatty acids
c. four rings of carbon to which other atoms are attached
d. the same functional groups
e. the same number and positions of double bonds
ANSWER: c
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The cytoskeleton is involved in which of the following cellular responses?
A. phagocytosis B. Toll-like receptor binding C. extravasation D. phagocytosis and extravasation
Trophic-level transfer efficiency averages about
A. 1%. B. 25%. C. 33%. D. 10%. E. 0.1%.
d. response to a stimulus
a. order b. sensitivity to stimuli c. reproduction d. adaptation
Ernst Mayr, the scientist from the New Guinea study on "birds of paradise", knew that the natives
understood speciation because they
a. have a museum with many catalogued specimens. b. have individual names for many of the species. c. have many biologists in New Guinea that studied the speciation. d. helped to achieve the speciation. e. teach speciation theories in school.