Meiosis is the basis for
a. cellular division.
b. sexual reproduction.
c. asexual reproduction.
d. sexual and asexual reproduction.
e. distribution of cytoplasm
B
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When studying fluid and electrolyte loss during exercise, Robert Cade found that human sweat has sodium and chloride concentrations that are
A. higher than those found in the blood. B. lower than those found in the blood. C. equal to those found in the blood. D. extremely variable from person to person relative to those found in the blood.
Mammalian Alu elements are likely derived from
a. retroviruses. b. regions of tndemly repeated sequences. c. 7SL RNA transcripts. d. introns transposed from functional genes. e. reverse-transcribed mRNAs.
The interferon-gamma release assay for tuberculosis infection works because
A) individuals who have had the TB vaccine can be identified by the amount of interferon-gamma in their blood. B) the presence of interferon-gamma indicates a person is susceptible to TB infection. C) the T cells of an infected person release more interferon-gamma than that of a non-infected person. D) one can perform an indirect ELISA to detect antibodies to interferon-gamma in a patient with TB. E) the TB bacterium releases interferon-gamma.
________ are cyclic nitrogenous bases with two rings and pronounced aromatic properties.
A. Quinones B. Purines C. Amino acids D. Fatty acids