Cells of the second line of defense called ________ recognize and kill virus-infected cells
A) basophils
B) eosinophils
C) macrophages
D) NK cells
E) dendritic cells
D
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Based on molecular analyses, scientists now believe the domestication of the closest relatives of modern dogs began
between ____ years ago.
a. 800 and 1,200 b. 1,000 and 3,000 c. 4,000 and 8,000
d. 9,000 and 12,000 e. 18,800 and 32,100
What is the name for the study of the geographic distribution of species?
A. Systematics B. Ecology C. Taxonomy D. Biogeography
How did the researchers first know that Marilyn the chimp may be infected with HIV?
a. Because she had HIV RNA in her blood b. Because she had HIV DNA in her tissues c. Because she had been used in HIV research d. Because she had raised antibodies against HIV e. Because she had symptoms of HIV infection, or AIDS
Which of the following statements concerning cellular metabolism is FALSE?
A) Energy obtained from nutrients or light is stored in the bonds of ATP. B) Enzymes are used in both catabolic and anabolic reactions. C) Macromolecules are converted into cell structures via catabolism. D) The goal of metabolism is reproduction of the organism. E) ATP is used in the formation of macromolecules.