What do we mean by "The Oxygen Crisis" in relation to the evolution of life on Earth?
A) the extinction of older anaerobic life as oxygen built up in the atmosphere
B) the time period before the development of the ozone layer
C) a period when evolution accelerated so rapidly that there was insufficient oxygen available
D) the destruction of oxygen in the early atmosphere

Question

Quizplus · Accepted Answer

The Oxygen Crisis refers to the gradual increase of oxygen in the Earth's atmosphere, which led to the extinction of older anaerobic life forms that were unable to survive in an oxygen-rich environment. This event is also known as the "Great Oxygenation Event."

What Do We Mean by "The Oxygen Crisis" in Relation