Which of the following environmental and host factors influence the composition of resident microflora on the skin?
A) age
B) personal hygiene
C) weather
D) age, personal hygiene, and weather
Answer: D
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A population ecologist wants to estimate the
size of a robin population. In an apple orchard, she captures 10 robins, marks them, and then releases them. She returns several weeks later and captures another 10 robins of which 2 are robins she previously marked. The estimated population size of robins is
a. 50 b. 15 c. 10 d. 200 e. 20
Which is NOT one of the three groups of modern
mammals? a. placentals b. therapsids c. marsupials d. monotremes e. pouched
What kind of circulatory system do fishes have?
A) tricuspid loop B) open circulatory system C) single loop D) double loop
Please select the statement which explains why it is important to be able to differentiate between the coliform and noncoliform members of the Enterobacteriaceae family.
A) The coliforms and noncoliforms are treated with completely different antibiotics. B) Coliforms are found in humans, while the noncoliforms are associated with animals. C) The coliforms are transmitted human-to-human, while the noncoliforms are not. D) The noncoliform bacteria are the true pathogens of this family, while the coliforms are opportunistic pathogens. E) Coliforms are gram-negative while noncoliforms are gram-positive.