________ techniques are based on recreating a microenvironment in the laboratory to promote the growth of a microorganism formerly restricted to a small ecological niche.

A. Enrichment culture
B. Fastidious growth
C. Community growth
D. PCR


Answer: A

Biology & Microbiology

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X chromosome inactivation results in the

a. total inactivation of both X chromosomes. b. inactivation of only the paternal X chromosome. c. inactivation of only the maternal X chromosome. d. inactivation of either the paternal X chromosome or the maternal X chromosome. e. nonrandom inactivation of X chromosomes in the initial cells of tissues.

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Which type of somatic receptor detects touch and pressure in the skin?

a. Melanocytes b. Hair and hair follicle c. Glands of skin d.Cutaneous receptors

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K-selected populations tend to reproduce quickly.

Answer the following statement true (T) or false (F)

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The major function of interferon-gamma is to

A. Induce the activation of resident macrophages B. Inhibit migration of macrophages from reaction sites C. Promote and maintain the proliferation of T cells D. Promote B and T cell growth

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