A viral species is not defined on the basis of the disease symptoms it causes. The best example of this is
a. polio.
b. rabies.
c. hepatitis.
d. chickenpox and shingles.
e. measles.
Answer: c. hepatitis.
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Which of the following is not a function of the eukaryotic glycocalyx?
A. Adherence B. Reception of chemical signals C. Movement D. Protection
A single human cell encloses about 1.5 meters of DNA containing 4.5 billion base pairs. How far apart are these base pairs in the DNA?
a. 3.3 × 10^?10 nm b. 3.3 × 10^10 nm c. 3 × 10^9 nm d. 300 nm e. 0.33 nm
The human cardiovascular system is comparable in some ways to a car's:
A) electrical system. B) cooling system. C) engine. D) transmission system.
If the frequency of a particular allele that is present in a small, isolated population of alpine plants decreases due to a landslide that leaves an even smaller remnant of surviving plants bearing this allele, then what has occurred?
A) a bottleneck B) genetic drift C) microevolution D) A and B only E) A, B, and C