The key phagocytic cells of the body are the

A. eosinophils and macrophages.
B. neutrophils and macrophages.
C. macrophages and monocytes.
D. natural killer cells.
E. basophils and neutrophils.


Answer: B

Biology & Microbiology

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Specific immunity in the extracellular fluid is provide by mainly

A. IgG and IgM B. IgM and IgD C. IgA and IgE D. IgD and IgA E. IgE and IgG

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In the cells of a female mammal, ________ is(are) inactivated

a. either the maternal or paternal X chromosome b. all maternal X chromosomes c. all paternal X chromosomes d. both the maternal and paternal X chromosomes

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is the specialized field of study that examines fossils and other clues to past life or environmental conditions.

A. Astrology B. Genetics C. Geology D. Microevolution E. Paleontology

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A rapidly growing population is indicated by

a. A. b. B. c. C. d. D. e. none of these

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