A given photon of light may trigger an action potential with thousands of times more energy because the signal strength is amplified by _____
A) the receptor
B) a G protein
C) a signal transduction pathway
D) triggering several receptors at once
C
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Although most autotrophic microorganisms fix carbon dioxide using the Calvin-Benson cycle, this pathway is absent in the Archaea.
Answer the following statement true (T) or false (F)
Chlorination of water supplies represents an epidemiological technique directed at
A. eliminating susceptible individuals. B. sterilizing water. C. eliminating sources of infection. D. improving the palatability of water.
The study of the body structures of the ostrich, emu and rhea shown here is an example of ____
a. morphological divergence b. comparative morphology c. anatomical convergence d. biogeography e. radiometric dating
Lichens are:
A) fungi adapted for life in rocky soil. B) algae-like fungi. C) fungi that grow on the roots of plants. D) a mutualistic association of algae or photosynthetic bacteria and fungi.