Register
Until the early _______ there were only negligible amounts of free oxygen in the atmosphere.
232k views
1 vote
Until the early _______ there were only negligible amounts of free oxygen in the atmosphere.

User Anjali Kevadiya
by
8.2k points

1 Answer

4 votes
During the early earth, when photosynthesis has not yet evolved, there were only negligible amounts of free oxygen in the atmosphere. It was said that the Earth's atmosphere had no free oxygen then. This is about 3.5 billion years ago.
User Mawcel
by
7.7k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

What are three ways water erodes the surface of earth
How does weathering affect Plateaus?
An example of a stateless nation in the middle east is provided by who?
What southeast city of Brazil is located near 23 degrees s and 43 degrees west?
The active sections that are located along fault lines are called
Link Copied!