Before the modern era of science, organisms were assigned to species on the basis of
A) the existence of fossils of earlier forms.
B) geographic location.
C) similarities in appearance.
D) behavioral similarities.
E) their capability of interbreeding.
C
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Four of the five answers listed below are end-products of digestion ready for intestinal absorption. Select the exception
a. monoglyceride b. monosaccharides c. disaccharides d. amino acids e. free fatty acids
The vertebrate central nervous system is a brain and _________. Fill in the blank(s) with the appropriate word(s)
Vascular tissue that transports organic nutrients and sugars from the leaves to the roots is
A. phloem. B. cambium. C. xylem. D. periderm. E. sclerenchyma.
Population bottlenecks can lead to the fixation or loss of alleles in otherwise large pop-ulations because the bottleneck:
a. selectively eliminates or fixes alleles. b. reduces the effective population size to close to the size of the bottleneck. c. allows migrant alleles to overwhelm native alleles. d. A and B. e. All of the above.