If you were planning the colonization of a distant planet, what would you do to insure that the
population remained genetically healthy for a long time?
What will be an ideal response?
To avoid genetic drift and the occurrence of genetic disease, you would want to begin with as large a
population as possible. You would also want that population to be as genetically diverse as possible,
and so you would include as many different racial and ethnic groups as possible. You would, of
course, also screen applicants for their genetic background to avoid the introduction of alleles
concerned with genetic disease in the first place. You would encourage random mating among the
colonists, urging them to avoid cliques of similar racial and genetic makeup. You might also monitor
levels of cosmic and other radiation on the planet, and take steps to shield the colonists from potential
mutagenic or carcinogenic radiation.
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Indicate whether the statement is true or false.
Why do species with large body sizes typically have lower population densities?
a. each large organism consumes more available resources b. there are not enough individuals to grow the population c. genetic diversity is low d. small organisms have more potential mates e. large organisms do not like living near one another
All of the following pertain to cephalosporins, except
A. many are administered by injection, not orally. B. they have a beta-lactam ring. C. newer generations have activity against gram-negative bacteria. D. they have greater resistance to beta-lactamases. E. they are are synthetic drugs.
Which of the following is a ciliated pathogen of the intestinal tract?
A. Balantidium B. Plasmodium C. Trypanosoma D. Leishmania E. Giardia