Natural selection for a certain phenotype will affect the _____ .
A. genotype of an individual
B. genotype of a population
C. allele frequency of an individual
D. allele frequency of a population
D. allele frequency of a population
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"Mad cow" disease, also called bovine spongiform encephalopathy, is caused by a ________
a. virus b. fungus c. bacteria d. prion
How do vesicles carrying proteins destined for secretion move to the plasma membrane?
A. by diffusion B. They swim with flagella. C. along actin D. They swim with cilia. E. along microtubules
What is the advantage of using PCR over traditional bacterial cloning to generate large quantities of a specific piece of DNA?
What will be an ideal response?
How does aspirin act to decrease the symptoms of inflammation?
A) it acts as an antiprostaglandin. B) it is an antitoxoid for most microbial toxins. C) it prevents complement activation. D) it interferes with the action of interferons. E) it blocks the release of histamine.