Agarose gel electrophoresis separates nucleic acid fragments according to
A. density.
B. shape.
C. size.
D. sequence.
C
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A small decrease in seawater pH was shown to have a significant effect on ____
a. climate change b. the oceanic sink for carbon dioxide c. gene expression in sea urchin larvae d. genes expression in zooplankton e. carbon dioxide accumulation in the ocean
Where are a mollusk’s gills located?
a. within the visceral mass b. under the foot c. in the mantle cavity d. surrounding the radula
When the reproductive cells of different species are incompatible and cannot accomplish fertilization,
it is referred to as: a. behavioral isolation. b. gametic isolation. c. hybrid breakdown. d. temporal isolation. e. hybrid sterility.
In which phase would you expect to observe the most endospores in a Bacillus cell culture?
A. death phase B. lag phase C. log phase D. log, lag, and death phases would all have roughly the same number of endospores.