Archaea as a group are not pathogens. This is because
A. mammals evolved special defenses against them.
B. they evolved without mammals.
C. they are out-competed by natural flora.
D. mammalian hosts do not meet their environmental requirements.
Answer: D
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T cells that react with self antigens are destroyed through:a
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In crowded Asian regions such as Hong Kong, there is not enough room for cemeteries. However, the dead can be temporarily buried and their bones can later be exhumed and stored in an ossarium, a wall made of small concrete boxes (about eight inches by eight inches by two feet long) just large enough to contain all the human bones. These dimensions are defined by the ________, which is the longest bone and the ________, which is the bone with the largest volume in the human body.
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Herceptin is a drug that is given to treat certain breast cancers. However, it is most effective on tumors that are overexpressing HER2. Therefore, patients are tested for HER2 overexpression before being given Herceptin
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