________ 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
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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.
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
K-selected populations tend to reproduce quickly.
Answer the following statement true (T) or false (F)
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