As early organisms evolved the ability to harness energy from the sun,other organisms began to die out because they were ____.
A)destroyed by a meteorite
B)outcompeted by multi-celled organisms
C)consumed by dinosaurs
D)poisoned by oxygen gas
E)starved

Question

Quizplus · Accepted Answer

As early organisms evolved and began to harness energy from the sun via photosynthesis, they produced oxygen gas as a byproduct. This eventually led to a buildup of atmospheric oxygen, which was toxic to many of the earlier forms of life that had evolved in an anaerobic environment. Over time, these organisms died out due to the poisonous effects of oxygen, allowing for the success and diversification of the oxygen-utilizing life forms that thrived in the increasingly oxygen-rich environment.

As Early Organisms Evolved the Ability to Harness Energy from the Sun,other