Climate has been proposed to play a role in the latitudinal diversity gradient. Specifically, some have hypothesized that
A. the warm climate of the tropics promotes
high speciation rates.
B. the warm climate of the tropics promotes
niche diversification.
C. relatively few species are able to adapt to
the harsher, more variable climates of the
high latitudes.
D. the harsh, more variable climates of the
high latitudes reduce speciation rates.
E. none of these
C
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A. Quorum sensing in Vibrio B. Chemiosmosis in Paracoccus C. Spore formation in Bacillus D. Stringent response in Escherichia
The organism that causes malaria
a. is a multicellular protozoan. b. is the anopheles mosquito. c. attacks the protein globin in skin cells. d. is a single-celled protozoan. e. causes the overproduction of red blood cells.
Why is the African elephant considered a keystone species?
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Which of the following kingdoms can do photosynthesis?
A. all animals B. some protists C. all bacteria D. some fungi E. all archaea