An important advantage of sexual reproduction is related to _____
a. increasing production of offspring
b. avoiding predators
c. avoiding harmful mutations
d. producing offspring identical to the parents
e. having two sexes
ANSWER: c
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The major vector of Rocky Mountain spotted fever in the western United States is
A. Rickettsia rickettsi. B. Rickettsia prowazeki. C. Borrelia burgdorferi. D. Dermacentor andersoni
What is the function of normal biota of the respiratory tract?
A. Provides antibodies B. Microbial antagonism C. Competes with pathogens for resources and space D. Both [competes with pathogens for resources and space] and [microbial antagonism] are correct. E. All of these three functions are correct.
Global air circulation patterns affect climate and the distribution of __________. Fill in the blank(s) with the appropriate word(s)
How does urban sprawl directly or indirectly affect human health?
A. Traffic and congestion during a long commute increases air pollution. B. More time in the car means less time to exercise (i.e. walk or bike). C. Many children now grow up without the experience of roaming through woods and fields; this is known as Nature Deficit Disorder. D. All of the above are correct. E. Urban sprawl has absolutely no effect on human health. No studies have ever been done to examine this.