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The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.
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Which of the following factors would not contribute to allopatric speciation? a) the isolated population is exposed to different selection pressures than the ancestral population.b) a population becomes geographically isolated from the parent population. c) gene flow between the two populations is extensive.d) the separated population is small, and genetic drift occurs. e) different mutations begin to distinguish the gene pools of the separated populations.
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The relationship between the remora is and the shark is an example of...
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