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Question
The oxic atmosphere created conditions that led to the evolution of various new metabolic pathways, such asA) sulfide oxidation.
B) nitrification.
C) iron oxidation.
D) sulfide oxidation, nitrification, and iron oxidation.
Answer
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Which of the following statements about chlamydial infections is TRUE?
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In 2003, the majority of AIDS deaths occurred in
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Cholera is an example of a pandemic disease that
A) has multiple wild animal reservoirs and is thus difficult to eradicate.
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C) is spread through direct contact and has only a human reservoir.
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Influenza pandemics occur cyclically because
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