The most important concept in the field of population genetics is
A. natural selection.
B. population size.
C. rates of mutation.
D. genetic variation.
E. phenotypic variation.
D. genetic variation.
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Incubation of cells at 20°C blocks the release of proteins from the trans-Golgi. Under such conditions, you would expect to see
A. an increase in exocytosis. B. a decrease in exocytosis. C. an increase in endocytosis. D. a decrease in endocytosis.
A bacterial "bloom" is:
A. the reproductive parts of bacteria B. malformation of flowers caused by bacterial infections C. unusual coloring of the water of lakes, ponds, or the sea caused by high numbers of bacteria D. souring of milk caused by bacteria E. swelling of a wound because of bacterial infection
The cell walls of fungi are made up of polysaccharides including
A. phospholipids. B. polyglycans. C. chitin. D. glycolipids. E. bilipid layers.
All of the following are examples of different types of microbiological media except
A. Petri dish. B. enriched. C. agar. D. broth. E. gelatin.