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 builds 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 time period when oxygen began to build up in Earth's atmosphere due to the emergence of photosynthetic organisms. This rise in oxygen levels caused the extinction of many anaerobic life forms, leading to a crisis for these species. However, it eventually paved the way for the evolution of aerobic organisms, including animals and humans.

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