California tarweed seeds were able to reach the Hawaiian Islands, and a new species emerged from this isolated population. What concept applies to this example?
A) the founder effect
B) hybridization
C) punctuated equilibrium
D) polyploidy
A
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Cell extension involves
A. loss of water. B. low acidic condition. C. enzymes that produce polysaccharides. D. expansion of cellulose microfibrils. E. water leaving the central vacuole.
Embryonic stem cells derived from blastocysts are called pluripotent because they ________
A. are viable under a wide range of laboratory conditions B. can form most cells, tissues, and organs of the human body C. can form all cells, tissues, and organs of the human body D. are viable under a wide range of laboratory conditions and can form most cells, tissues, and organs of the human body E. are viable under a wide range of laboratory conditions and can form all cells, tissues, and organs of the human body
Which of the following structures contains high pressure baroreceptors?
A) aortic arch only B) carotid sinus only C) right atrium only D) both the aortic arch and carotid sinus E) aortic arch, right atrium, and carotid sinus
Which two scientists evidenced evolution via natural selection as an idea whose time had come?
a. Darwin and Wallace b. Darwin and Lamarck c. Darwin and Malthus d. Lamarck and Wallace