All of the following must be overcome by an opportunistic fungal species as it attempts to establish infection in a new host EXCEPT
A. immune factors such as IgA, complement, and white blood cells.
B. non-optimal pH for fungal growth.
C. presence of nutrients.
D. the presence of normal microbiota.
Answer: C
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Which of the following is not a component of the demography of a population?
1.size and density 2.distribution pattern 3.age structure 4.all are demographic characteristics
In transcription, RNA polymerase binds to a
__________ in the DNA near a gene, and then assembles a strand of RNA. Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT a cause of mutation?
Errors in DNA replication Errors during meiosis Exposure to radiation Exposure to tobacco All of the choices are causes of mutations
Which of the following will tend to produce adaptive changes in populations?
A) genetic drift B) gene flow C) natural selection D) the founder effect