Why is the absence of atmospheric oxygen (O2) so important to the Oparin-Haldane hypothesis?
a. Oxygen is corrosive and thus would have degraded many of the metallic compounds on
the surface, releasing toxic gasses into the new atmosphere.
b. Oxygen is more reduced than hydrogen gas, methane, or ammonia.
c. Oxygen would have supported microorganisms that help chemical decay proceed.
d. Oxygen is able to reverse reactions by removing electrons and hydrogen from organic
molecules, thus destroying the first organic compounds as quickly as they developed.
e. Oxygen would have caused multiple explosions, converting chemical energy into heat
energy and rendering that energy unavailable for driving the synthesis of organic
molecules.
D
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Sharks, rays, and skates belong to what group?
a. lobe-finned fish b. ray-finned fish c. cartilaginous fish d. bony fish e. reptiles
Why are the predator and prey growth curves out of phase? a. Because both predator and prey are responding to changes in the previousgeneration of the other population
b. Because neither population can respond instantly to changes in the otherpopulation. c. Because reproductive cycles in either population cause a delay in response tothe other population. d. All of the above.
The evolution of aerobic respiration ____ both oxygen and carbon dioxide levels in the biosphere
a. mutated b. stabilized c. increased d. decreased e. eliminated
At which type of incidents is rehabilitation a concern?
a. all fire incidents b. all incidents c. incidents requiring the use of full PPE d. high intensity / long duration incidents