The last case of naturally contracted smallpox occurred in
A. 1900.
B. 1950.
C. 1965.
D. 1977.
E. 1989.
D
Biology & Microbiology
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Copy number variants
A) are extremely rare, occurring in only about a dozen sites in the genome. B) are found only in even-numbered chromosomes. C) number in hundreds to thousands. D) are five or fewer bases long.
Biology & Microbiology
True jellyfish belong to the class Scyphozoa of the phylum Cnidaria
Indicate whether the statement is true or false
Biology & Microbiology
Cytoplasmic DNA is a feature of _______________cells
a. eukaryotic b. prokaryotic c. animal d. plant
Biology & Microbiology
The immune system component with a principal role at point B in the accompanying figure is:
a. memory cells. b. IgM antibodies. c. IgG antibodies. d. cytotoxic T cells. e. antibody IgA.
Biology & Microbiology