A long-term study on guppies illustrates the effect of predation on life history traits. In this study, what occurred when guppies from streams with cichlids (prey on larger guppies) were moved to streams with killifish (prey on smaller guppies)?
a. Guppies became larger in one generation.
b. Guppies became smaller in one generation.
c. Guppies became larger over several generations.
d. Guppies became smaller over several generations.
e. Guppies did not change size.
c
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Staphylococcus aureus is a common cause of food poisoning in the United States.
Answer the following statement true (T) or false (F)
New genes are introduced into a gene pool by
A. evolution. B. spontaneous mutations. C. natural selection. D. inheritance of acquired characteristics.
How does water quality testing make use of environmental microbiology?
What will be an ideal response?
The white blood cells primarily responsible for adaptive immunity are
A. NK lymphocytes and neutrophils. B. B lymphocytes and T lymphocytes. C. macrophages and eosinophils. D. macrophages and neutrophils. E. neutrophils and dendritic cells.