To help avoid a waterborne infection, what would you recommend to a traveler going to South America?

a. vaccination
b. bring chlorine with you
c. only consume/use bottled water
d. only consume canned foods and beverages


Answer: c. only consume/use bottled water

Biology & Microbiology

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Crossing over occurs during

A) prophase I. B) metaphase I. C) prophase II. D) metaphase II.

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What fraction of your DNA is the same as

every other human being? a. 50% b. 75% c. 90% d. 95% e. 99%

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The displacement loop (D-loop) may be a characteristic of

A) centromeres. B) telomeres. C) A-DNA. D) B-DNA. E) Z-DNA.

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Races of humans are unlikely to evolve extensive differences in the future for which of the following reasons?

I. The environment is unlikely to change. II. Human evolution is complete. III. The human races are incompletely isolated. A) I only B) III only C) I and II only D) II and III only E) I, II, and III

Biology & Microbiology