Refer to the accompanying figure. Which cell type is the source of antibodies?
a. A only
b. B only
c. C only
d. D only
e. both A and B
d
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Most TNRE repeats involve expansion of which codon?
A. GAA B. CAG C. ATG D. CCC E. Any codon containing three of the same bases
Among the mammals, only some primates (including most humans) have color vision. What was the likely advantage that probably drove the evolution of primate color vision?
A. ability to detect poisonous, warningly colored fruits B. ability to find ripe fruit C. ability to enjoy the esthetic value of pretty flowers D. ability to prepare for winter as portended by autumn colors of leaves E. None of the choices provided is likely correct.
Which of the following characterize biofilms that form within the body?
A. Biofilms protect microorganisms from antibiotics. B. Biofilms help microorganism adhere to human tissue. C. Biofilms are usually made up of only one species of bacteria. D. Biofilms are formed only by Gram-positive bacteria. E. Biofilms protect microbes from the body's defenses.
The two components of the binomial name of a microorganism are the
a. order and family b. genus and variety c. genus and species d. family and genus