The movement of alleles among populations is called _____
a. bottleneck
b. mutation
c. founder effect
d. gene flow
e. genetic drift
ANSWER: d
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The reproductive systems of many insects can be manipulated by parasitic symbionts, which are passed down to each generation and can skew the sex ratio of their progeny
Indicate whether the statement is true or false.
Comparisons of genetic information from various invertebrate groups has
a. confirmed nearly all classifications that were based on phenotypic resemblances. b. provided a complete and final picture of animal phylogeny. c. led to a decision to forgo formal classification of animals, as animal relationships are too complex to determine. d. led to a reworking of the classification of animals that is still being refined. e. confirmed that some invertebrates should be classified as vertebrates.
The systolic pressure for a normal young adult would be under
a. 60 mm Hg. b. 80 mm Hg. c. 100 mm Hg. d. 120 mm Hg. e. 140 mm Hg.
River blindness is
A. transmitted by mosquito vector. B. preventable by a vaccine administered to travelers. C. a disease caused by helminths invading the eyes. D. endemic in Australia, New Zealand, and South Pacific islands.