The definitive host of a parasite is
A) the host for immature stages of the parasite.
B) where the mature form of the parasite occurs.
C) also the vector for the parasite.
D) the host that the parasite name is based on.
E) the host for the dormant stage of the parasite.
B
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Which of the following stimulates spermatogenesis?
a. Gonadotropin-releasing hormone b. Testosterone c. Progesterone d. Luteinizing hormone
What did the researchers conclude based on the data in figure (a)?
A. Endostatin shrunk tumors without development of resistance.
B. Endostatin shrunk tumors but resistance developed.
C. Cyclophosphamide delayed the growth of tumors without development of resistance.
D. Cyclophosphamide delayed the growth of tumors but resistance developed.
E. Tumors in untreated cells shrank in size.
What was the most important factor in restoring the Curtis Prairie at the University of Wisconsin, Madison?
A. removal of alien intruders B. reintroduction of native bison C. planting seeds D. periodic fires E. allowing domestic livestock to disperse seeds
The function of the lambda Cro protein is
a. to maintain lysogeny. b. to prevent the synthesis of lambda repressor. c. to degrade cII. d. to inhibit expression of the late genes. e. to integrate lambda DNA into the bacterial host chromosome.