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Lady_Fox [76]
2 years ago
8

How did Earth's atmosphere become oxygen-rich?

Biology
1 answer:
eduard2 years ago
4 0

Answer:

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. ... "What it looks like is that oxygen was first produced somewhere around 2.7 billion to 2.8 billon years ago.

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What is relay neuron?
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Relay neurons are found between sensory input and motor output/response. Relay neurons are found in the brain and spinal cord and allow sensory and motor neurons to communicate. Motor neurons are found in the central nervous system (CNS) and control muscle movements.

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List all the seven continenets
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3 years ago
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3. Which is not a true statement about the evidence to support
Katyanochek1 [597]

Answer:

The answers that apply;

Researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang.

A redshift of light emitted by stars and galaxies indicates the universe is expanding

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Explanation:

Hope it helps:)

4 0
2 years ago
What do the following two equations represent?<br> 5x +y = 3<br> . 10x + 2y = -6
cupoosta [38]

Answer:

Choose distinct parallel lines.

Explanation:

They represent two parallel lines. The slopes are going to be the same in each line . Put the x value on the opposite side of the equal sign.

y = - 5x + 3           The slope is - 5

10x + 2y = - 6        Subtract 10x from both sides

2y = - 10x - 6         Divide by 2

y = -10x/2 - 6/2

y =-5x - 3

That minus three is the problem. You have 2 different y intercepts. That means that you have 2 parallel lines.

8 0
2 years ago
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