The net migration of alleles into or out of a population from neighboring populations is called
A) gene flow.
B) genetic drift.
C) sexual selection.
D) stabilizing selection.
E) coevolution.
A
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Most dinosaurs died out by the end of the ____ period
a. Triassic b. Jurassic c. Cretaceous d. Quaternary e. Permian
What would be the physiological effect of an increase in the venous return to the heart?
A. increased stroke volume B. decreased cardiac output C. increased sympathetic stimulation of the heart D. increased secretion of ADH (vasopressin) E. decreased secretion of atrial natriuretic hormone Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about blood return to the heart? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A temporary oxygen deficit during strenuous exercise causes a muscle to
A) synthesize muscle proteins in response to steroid hormone stimulation. B) synthesize glycogen. C) ferment pyruvate to lactate. D) switch to aerobic glycolysis. E) synthesize more NAD+.
Which gene therapy is currently approved in the United States?
A) stem cell gene therapy B) enhancement gene therapy C) somatic gene therapy D) germ-line gene therapy