The common cold is typically caused by a(n)
a. enterovirus.
b. retrovirus.
c. picornavirus.
d. rhinovirus.
e. adenovirus.
D
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The MOST important potential common source of infectious disease is
A) industrial waste. B) arthropod reservoirs found near surface water supplies. C) water. D) human and animal wastes.
The fluid which bathes and nourishes the tissue cells is the
A. cytoplasm. B. lymph. C. blood. D. interstitial fluid.
Movement of individuals into or out of the population, called gene flow, impacts evolution of populations because
A) it can lead to extinction of one or more populations. B) it may cause genetic drift. C) it leads to a redistribution of alleles. D) adaptive radiation results. E) a founder effect will occur.
Each of the following has a better chance of influencing gene frequencies in small populations than in large populations, but which one most consistently requires a small population as a precondition for its occurrence?
A) Mutation B) Non-random mating C) Genetic drift D) Natural selection E) Gene flow