Allele frequencies change at ______ rate under mutation versus selection
a. the same
b. a faster
c. a slower
d. a constant
e. None of the above
C
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What is the function of a Toll-like receptor?
A. to bind to surface molecules present on phagocytes B. to bind to cytokines C. to bind to surface molecules present on pathogens D. to facilitate the extravasation of phagocytes
2D chromatography is so named because ____
a. there are two steps: labeling with a radioactive marker and separation via chromatography b. the molecules are separated into a linear arrangement, meaning two dimensions c. the process separates the molecules in two directions, first along the x axis and then along the y axis d. two different solutions are used in the paper chromatography process e. two different types of radioactive markers must be used
Heterotrophic organisms cannot make their own food
Indicate whether the statement is true or false
Gene therapy has not yet cured any patient of his or her genetic disorder
a. True b. False