A ________ mutation does not alter the amino acid sequence of the resulting protein.
A. nonsense
B. silent
C. missense
D. None of the choices are correct.
Answer: B
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Which example describes microevolution?
A) Birds evolved from dinosaurs. B) Lions and tigers evolved from a common cat-like ancestor. C) HIV evolved resistance to antiviral medications. D) Land plants evolved from algae.
Which of the following statements about tuberculosis (TB) is false?
A. HIV and TB can be transmitted in the same manner. B. Not completing a full course of antibiotic can select for MDR strains. C. The reservoir of TB is humans and no vector is required for transmission. D. MDR TB is more expensive to treat. E. The spread of TB can be very rapid.
Which of the following preservation tactics would have the greatest impact on saving the largest number of species?
A. preserve a large tract of land that contains source populations of flagship species B. preserve multiple small tracts of land that each contain source populations of keystone species C. preserve several small tracts of land that contain source populations of keystone species D. preserve a large tract of land that contains source populations of keystone species E. preserve a large tract of land that contains sink populations of keystone species
Which organism is a marsupial?
A) echidna B) kangaroo C) whale D) zebra