Removal of herbal medicines from USDA regulation by the DSHEA in 1994 led to
A. marketers proving that the medications work.
B. marketers providing misinformation about the effectiveness of the herbal medicines.
C. decreased use of herbal medicines.
D. none of these.
B. marketers providing misinformation about the effectiveness of the herbal medicines.
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Which of the following best describes how chromosomes move toward the poles of the spindle during mitosis?
A) The chromosomes are "reeled in" by the contraction of spindle microtubules. B) Motor proteins of the kinetochores move the chromosomes along the spindle microtubules. C) Nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles. D) The chromosomes are "reeled in" by the contraction of spindle microtubules, and motor proteins of the kinetochores move the chromosomes along the spindle microtubules. E) The chromosomes are "reeled in" by the contraction of spindle microtubules, motor proteins of the kinetochores move the chromosomes along the spindle microtubules, and nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles
Which of the following human cells are hosts
to HIV?
a. red blood cells b. nerve cells c. white blood cells d. muscle cells e. more than one of these are host cells to HIV
When substrate-level phosphorylation occurs, it means that
A. ATP is converted into ADP plus a phosphate group. B. ADP is converted into ATP by the addition of a phosphate group. C. NADH is converted into NAD+ plus a proton. D. NAD+ is converted into NADH.
In radishes, red and white are the pure-breeding
colors, and long and round are the pure-breeding shapes, while the hybrids are purple and oval. The cross of a red, long radish and a white, round radish will produce an F2 generation in which a. the most common phenotype will be oval and purple. b. the purple color will occur with all three shapes of radish. c. the red color will occur with all three shapes of radish. d. all white, long forms produced will be purebreeding. e. all of these are true.