試題詳解

10. Which of the following is considered a likely explanation for the events ofthe Cambrian explosion?
(A) Complex predator-prey relationships and increased atmospheric oxygen levels led to a mass extinction event.
(B) A great surge of volcanic activity was triggered by significant movements of the continental plates and possibly by an asteroid impact.
(C) Complex predator-prey relationships and increased atmospheric oxygen levels promoted animal diversification.
(D) The massive growth of swamp vegetation depleted the atmosphere's carbon dioxide and eventually cooled the Earth's climate.
(E) Solar flares led to increased UV radiation intensity, which in turn promoted a high rate of mutation. This led to rapid diversification of animals.