Speciation _____
A) occurs at such a slow pace that no one has ever observed the emergence of new species
B) occurs only by the accumulation of small genetic changes over vast expanses of time
C) must begin with the geographic isolation of a small, frontier population
D) can involve changes to a single gene
D
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Whose discovery of streptomycin stimulated an intense search for other antibiotics?
A. Waksman B. Pasteur C. Fleming D. Ehrlich
The instrument used to measure blood pressure is called
(a) a sphygmomanometer. (b) a hemocytometer. (c) a hematocrit centrifuge. (d) none of the above.
A group of vertebrates that do not have bone are the
A. reptiles. B. sharks. C. ray-finned fishes. D. amphibians.
Glycolysis is a metabolic process that is conducted by nearly all cells. However, in addition to glycolysis, some cells also make use of another metabolic process called the Krebs cycle. What does this tell you about the evolution of these processes?
A. Both the Krebs cycle and glycolysis likely evolved at the same time B. As a metabolic process, glycolysis likely evolved prior to the Krebs cycle C. As a metabolic process, the Krebs cycle likely evolved prior to glycolysis