In places where the public sanitation is poor, people run the risk of getting ____
a. West Nile virus
b. cholera
c. SARS
d. anthrax
e. mononucleosis
ANSWER: b
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Which of the following is not a helminth that causes intestinal symptoms accompanied by migratory symptoms?
A. Trichuris trichiura B. Ascaris lumbricoides C. Necator americanus D. Toxocara
Which environment is most likely to produce trees without annual rings?
a. tropical rain forest b. northern evergreen forest c. areas with alternating wet and dry seasons d. temperate-deciduous forests e. none of these, because annual rings are characteristic of all trees
A fungus would be most likely to infect:a
skin. b. blood. c. bone. d. muscle. e. connective tissue.
A female fruit fly with the recessive mutant phenotype of white eyes and miniature wings is mated with a male possessing the wild-type phenotype of red eyes and normal wings
Among the F1s, all the females are wild-type while all the males exhibit the mutant phenotype. The F2s resulting from a testcross exhibit predominantly (63%) parental phenotypes. How do you explain these results?