A human reservoir of a disease is also called the carrier of the disease
a. true
b. false
Ans: a. true
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In most genes, the rate of synonymous mutations is significantly higher than that of nonsynonymous mutation. The MHC genes exhibit the reverse, having over twice as many nonsynonymous as synonymous mutations. Explain this phenomenon
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Beryllium's atomic mass is 9, and its atomic number is 4. How many neutrons are found in a beryllium atom?
A) 9 B) 13 C) 4 D) 5
Fossil evidence indicates that horses have gradually increased in size over geologic time. Which of the following terms best describes this?
A) artificial selection B) directional selection C) stabilizing selection D) disruptive selection E) sexual selection
A person who is unable to speak after a stroke has had damage to what part of the brain?
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