According to Darwin, natural selection is based on the ____ found in populations
a. acquired characters
b. variations
c. weakest members
d. noncompetitors
e. similarities
b
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Electron microscopes differ from light microscopes in that
A. electrons replace light. B. electromagnets replace glass lenses. C. resolution is higher. D. magnification is higher. E. All of the choices are correct.
Where does RNA polymerase first bind to on the E. coli lac operon?
a. the lac I repressor b. the promoter c. the operator d. the transcription initiation site e. the first codon of the lacZ gene
Garlic mustard is an invasive plant species in North American temperate forests. Garlic mustard secretes an allelochemical that interferes with relationships between native tree roots and their mycorrhizal fungi. This would be an example of
A. interference competition. B. exploitative competition.
Pharmacogenomics is the study of how
A) the genome affects responses to drugs. B) the genome leads to new drug discoveries. C) the genome affects microbial communities in the body. D) the genome is affected by drug use. E) medicines influence the genome of cancer cells.