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igomit [66]
2 years ago
14

what accounts for the significant increase in oxygen in earth's atmosphere 2 to 2.5 billion years ago?

Biology
1 answer:
sergiy2304 [10]2 years ago
6 0

Given what we know, we can confirm that the significant increase in oxygen in the Earth's atmosphere 2 to 2.5 billion years ago is due to cyanobacteria.

<h3>What are cyanobacteria?</h3>

These are tiny bacterial organisms. They were amongst the first organisms to use photosynthesis to sustain life. The sudden boom of cyanobacteria accounts for the rapid increase in oxygen given that they will use carbon dioxide to produce sugar through photosynthesis, expelling oxygen in the process.

Therefore, we can confirm that the significant increase in oxygen in the Earth's atmosphere 2 to 2.5 billion years ago is due to cyanobacteria.

To learn more about cyanobacteria visit:

brainly.com/question/832454?referrer=searchResults

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Answer is 3. Hope this helps!

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What are possible negative effects of building a hydropower dam? Select the two correct answers.
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The correct answers are B; Displacement of people living near the proposed dam and C; Lower river water levels in other areas.

Further Explanation:

The hydropower dam uses water instead of coal to generate electricity. Since they are build on the water, they will be using that source as a way to generate electricity. This will cause the water levels to be lower in some areas along the river.

When building a dam, they will need to use property that is located on the river. Many people own homes along the river banks all over the world. The company who will be building the dam will usually buy out the property owners at a fair market price. This will mean that they will have to move and leave their homes. The homes are typically torn down to make way for the dam.

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#LearnwithBrainly

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