Some biologists believe that life on Earth is in the midst of a sixth major mass- extinction event caused by
A) loss of genetic diversity due to inbreeding.
B) human activity.
C) a gradual decrease in global temperature.
D) sustainable agriculture efforts.
E) coevolution of predator and prey species.
Correct Answer:
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Q33: Pollutants such as may affect the reproduction
Q34: Sea turtle populations are threatened with extinction
Q35: The minimum viable population is the
A) number
Q36: In less- developed countries, many species are
Q37: The leading cause of extinction by human
Q39: As a result of global warming,
A) species
Q40: The most likely explanation for any mass-
Q42: Unsustainable farming practices include
A) abandoning fields and
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Q43: The greatest natural threat to newly hatched
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