Register
2. What was the first source of oxygen?
186k views
3 votes
2. What was the first source of oxygen?

User Johnny Cage
by
5.3k points

2 Answers

3 votes

Answer:

phytoplankton

Step-by-step explanation:

phytoplankton

User Florian Golemo
by
5.3k points
2 votes

The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen

User Chetan Shenoy
by
4.8k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.2m questions

6.7m answers

Other Questions

An example of the interaction of the nervous and endocrine systems can be seen in our response to danger. The _______________ orders the adrenal glands to release the hormones epinephrine and norepinephrine,
When an individual stops breathing, brain cells die very quickly, but the cells in the heart are able to survive for longer. Which conclusion is best supported by these facts?
Greg has been given a small sample of metal. His teacher has assigned him to identify what type of metal he was given. Which of the following is a physical property that will help Greg to identify the
What is the average speed of a biker that travels 50km in 5hrs?
Pixels are often referred to using DPI, or dots per inch. True\False
Link Copied!