Live weakened polio virus can be used directly in a(n)
A) inactivated whole-agent vaccine.
B) attenuated whole-agent vaccine.
C) conjugated vaccine.
D) subunit vaccine.
E) toxoid vaccine.
B
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A scientist is researching a population of blue jays in her city. In order to completely define this blue jay population, she must:
A. determine the size, range, and density of the blue jay population. B. determine the predators and parasites of the blue jay population. C. determine the climates in which the blue jays can survive. D. determine whether the blue jays are r- or K -strategists. E. determine the typical life history for an individual blue jay.
Which of the following best describes the kind of resource for which individuals may
A. It will most likely be food or some form of nutrient. B. It will most likely be related to space or shelter. C. It will most likely be related to reproduction, such as access to mates. D. It will most likely be related either to food, nutrients, space, or shelter. E. It can be any resource that is limited in the environment.
Korarchaeota ____
a. includes halophiles b. includes psychrophiles c. diverged very early in Archaean evolution d. includes halophiles and thermophiles e. diverged very late in Archaean evolution
Darwin was very interested in the observation that animals on distant and isolated landmasses appeared to be related to animals on the mainlands. However, despite their similar appearance, the animals were indeed not related. Which of the following types of evidence would help Darwin make sense of his observations?
A. biogeographical B. fossil C. anatomical D. biochemical