The major drainage structure within the lymphatic system is the ____
a. spleen
b. tonsils
c. right and left thoracic ducts
d. thymus gland
e. thoracic duct
ANSWER: e
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Which of the following pertains to Borrelia burgdorferi?
A. Coccus B. Bacillus C. Spirochete D. Filament
Among humans, sexual maturity occurs _______________
a. after puberty b. at adulthood c. when the sexual organs start to develop d. when the sex hormones are produced
Consider two traits for an organism, determined by two genes, each of which is governed by at least two alleles. In the case of a dihybrid individual, the gametes formed will be of either the parental type or the recombinant type. Recombinant type gametes are formed because of
a. incomplete dominance. b. independent assortment. c. heterozyogosity. d. the principle of dihybrids. e. multiple alleles.
There is a __________ flow of energy into and out of an ecosystem, and a cycling of materials among
resident species. Fill in the blank(s) with the appropriate word(s).