Which of the following does NOT constitute an advantage of using two antibiotics together?
A) It can prevent drug resistance.
B) It lessens the toxicity of individual drugs.
C) Two are always twice as effective as one.
D) It allows treatment to be provided prior to diagnosis.
E) All of these are advantages of using two antibiotics together.
C
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Proteoglycans are _____
A. both composed of collagen and provide resistance to compression. B. both composed of polysaccharides called glycosaminoglycans and provide resistance to compression. C. composed of polysaccharides called glycosaminoglycans. D. composed of collagen. E. resistant to compression.
What is the key concept addressed by the question?
What will be an ideal response?
Which worm phylum lacks body segmentation?
A. Flatworms B. Roundworms C. Annelids D. Both flatworms and roundworms
Mendel found that pea plants expressing a recessive
trait a. were pure-breeding. b. appeared only in the first generation of a cross between two pure-breeding plants expressing contrasting forms of a trait. c. disappeared after the second generation. d. could be produced only if one of the parents expressed the recessive trait. e. were none of these.