The study of evolutionary biology has influenced the techniques used by the health and livestock industries in which of the following ways?
a. Physicians often prescribe antibiotics in combination.
b. Livestock producers have entirely cut back on their inclusion of antibiotics in feed.
c. Pharmaceutical companies now recommend that physicians prescribe the highest safely toler-ated doses of new antibiotics.
d. A and C.
e. All of the above.
A
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The sensing of starvation that leads to sporulation in Bacillus subtilis is accomplished by a ________.
A. quorum regulatory effector B. small RNA C. response regulator D. sensor kinase
Which one of the following is a key advantage that eukaryotic cells have over prokaryotic cells?
A. Eukaryotic cells have a cell membrane, which allows them to ship materials into and out of the cell. B. Eukaryotic cells have ribosomes, which allow them to make more complex proteins. C. Eukaryotic cells have a flexible cytoskeleton, which allows them to change shape and gives them the ability to engulf other materials. D. Eukaryotic cells have a rigid cytoskeleton, which allows them to withstand greater stress. E. None of the answers options is correct.
digests fat
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The pancreas secretes digestive enzymes directly into the
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