Cholera is an example of a pandemic disease that
A) has multiple wild animal reservoirs and is thus difficult to eradicate.
B) spreads from a common source and could be controlled with adequate clean water and waste sanitation measures.
C) is spread through direct contact and has only a human reservoir.
D) has recently emerged due to overcrowding in urban centers.
Answer: B
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Based on your pedigree data, does the inheritance of color blindness appear to be related to the sex of the offspring?
a. Yes b. No
Which of the following is true of both cilia and flagella?
A) They are commonly found on cells of the respiratory tract. B) They are numerous and are short extensions. C) They move in a back-and-forth manner. D) They have a 9 + 2 pattern of microtubules.
______ are peripheral receptors with a T-shaped (pseudo-unipolar) cell type.
a. Chemoreceptors b. Photoreceptors c. Proprioceptors d. Thermoreceptors
In a fish population in a shallow stream, the genotypic frequency of yellowish-brown fish and greenish-brown fish changed significantly after a flash flood randomly swept away individuals from that stream. This change in genotypic frequency is most likely attributable to
a) gene flow b) disruptive selection c) directional selection d) genetic drift e) natural selection