Death from tetanus is usually due to
a. respiratory failure.
b. excessive bleeding.
c. high fever.
d. kidney toxicity.
Answer: A
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Humans contract Chagas disease when the reduviid bug defecates while taking a blood meal and the parasites in the feces are rubbed or scratched into the bite wound or onto mucosal surfaces. Which stage in the blood infects the host cells?
a. Amastigote b. Epimastigote c. Trypomastigote d. Promastigote
Suppose that two different groups of schmoos (an imaginary animal) live in geographically separated locations and rarely interbreed. On one occasion, a big-footed white-haired schmoo does mate with a small-footed brown-haired schmoo. Six offspring result: two big-footed schmoos with light brown hair and four small-footed schmoos with light brown hair. Which of the following statements about the inheritance of hair color in schmoos is most likely correct?
A: There is incomplete dominance for hair color. B: Brown is dominant to white. C: White is dominant to brown. D: White and brown are codominant. E: This cannot be answered without more information.
Which of the following are incorrectly matched?
A. gene C stamen formation, whorl 3 B. gene A, sepal formation, whorl 1 C. gene E petal formation, whorl 2 D. gene B, petal formation, whorl 2 E. gene B carpel formation, whorl 4
Which statement does not apply to pneumocystis pneumonia and its causative organism, Pneumocystis jirovecii?
A) HIV-AIDS patient are high-risk for this infection. B) Like all other pathogenic fungi, the reservoir is soil. C) The organism has some characteristics found in protozoans rather than fungi. D) The fungus does not make spores. E) Serological evidence suggests that most people are exposed to the organism in early childhood.