The warmest area of a lake during the summer is the ________.
A. limnion
B. hypolimnion
C. thermocline
D. epilimnion
E. benthic zone
Answer: D
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Researchers are interested in the genomes of prokaryotic species for all of the following reasons EXCEPT
A. bacteria cause many diseases that affect people, plants, and animals. B. bacteria reveal modes of infection. C. bacteria are more highly advanced than humans. D. the origin of the first eukaryotic cell probably involved a union between an archaeal and a bacterial cell. E. All of the choices are reasons for studying genomes of prokaryotic species.
Which of the following is (are) responsible for the
movement of nutrients upstream? a. migratory fish and other animals b. phytoplankton c. bacteria d. leaching e. all of these
When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side, what happened to the seedling?
A. It did not respond to the directional light. B. It waved back and forth. C. It wilted and died. D. It bent away from the directional light. E. It grew toward the light, as expected.
The selective chemical(s) in the Bile Esculin Agar is (are)
A. Esculetin B. Bile salts only C. Bile salts & esculetin D. Ferric citrate E. Esculin