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Evolution: Extinction Rates

APBIO-4DVJHD

Which of the following statements BEST explains the fact that 99.9% of all species that have ever existed on planet Earth are now extinct?

A

Climate changes associated with large comet or asteroid impacts occur faster than organisms can change themselves and adapt to the new environmental conditions.

B

Genetic variations within a population occur through random mutations, and given enough time, the environment will change in such a way that no existing genetic-based phenotypes permit survival.

C

The accumulation of random mutations in the genome of all organisms eventually leads to frameshift mutations in critical genes and are ultimately lethal.

D

The rapid increase in global temperatures in the past 100 years, combined with ocean acidification, heavy metal contamination, and ozone depletion caused by human activities have caused 99.9% of all of Earth's species to go extinct.