What % of Americans are considered overweight?
a. 50%
b. 75%
c. 85%
d. 66%
e. 33%
d
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The carbon cycle begins with ________.
A. anaerobic respiration B. aerobic respiration C. the conversion of carbon dioxide to methane D. carbon dioxide fixation
Ribosomal proteins that can act as translational repressors:
A. are not encoded by the same mRNA that they repress. B. bind to a site on the mRNA near the start site of one gene in the operon. C. bind to mRNA with higher affinity than to the appropriate rRNA molecule. D. bind to the mRNA when sensing that levels of r-proteinare low relative to rRNA.
What macroevolutionary concept is considered controversial by some people?
A) the appearance of new traits in existing populations B) the common descent of all organisms from one ancestral cell C) the concept of species being subdivided into separate populations D) the concept that genes can vary spontaneously
The material in the core of HIV (AIDS virus) is:
A) protein. B) xarbohydrate. C) RNA. D) DNA.