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kow [346]
4 years ago
8

When did Cyanobacteria start producing pure oxygen

Biology
2 answers:
AleksandrR [38]4 years ago
8 0

Answer:

After the hadeon

Explanation:

Travka [436]4 years ago
3 0

<u>Answer:</u>

Cyanobacteria start producing pure oxygen around 200 million years ago.

<u>Explanation:</u>

Many scientists believed that Earth did not have any oxygen. Cyanobacteria or the blue green algae are the microbes which produced oxygen for the first time with the help of photosynthesis.  This was around 4.5 billion years ago: after Hadean eon.

They were very simple, but they produced oxygen in the early earth’s atmosphere. So, they brought evolution on earth. This “blue-green algae” exists in salt water, rocks and soils and play a major role in maintaining the ecosystem.

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3 years ago
On the graph below, what would explain why the rabbit population levels drastically increased instead of decreasing drastically?
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Based on factors affecting population, the rapid increase in the rabbit population could be dues to high fertility rate, abundance of food and lack of predators.

<h3>What is population increase?</h3>

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Learn more about population increase at: brainly.com/question/2408010

7 0
2 years ago
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den301095 [7]

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