The primary targets for HIV are
a. helper T cells and macrophages.
b. helper T cells and cytotoxic T cells.
c. B cells, helper T cells, and cytotoxic T cells.
d. B cells and helper T cells.
e. B cells and macrophages.
A
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The endosymbiont theory is supported by all of the following evidence except for which statement?
A. Mitochondria are surrounded by two membranes. B. Mitochondria have a matrix. C. Mitochondria divide by binary fission. D. Mitochondria contain circular molecules of DNA. E. Mitochondrial ribosomes are similar to bacterial ribosomes.
Natural areas that are protected from human development are called ________
Fill in the blank(s) with correct word
Streptococcal pharyngitis, commonly called "strep throat," is caused by ________.
A. Streptococcus trachius B. Streptococcus pyogenes C. Streptococcus pneumoniae D. Streptococcus mutans
In gel electrophoresis, what factors can be altered to allow for differences in the resolution (i.e., the size differences among DNA fragments that can be distinguished)?
What will be an ideal response?