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user100 [1]
3 years ago
13

What type of organism makes up the oldest known fossil?

Biology
1 answer:
choli [55]3 years ago
8 0
Blue-green algae from South Africa at 3.2 billion years old.
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Answer:

A

Explanation:

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in the system labels B in figure 27-11, where does oxygen-poor blood go after leaving the heart? Why?
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Oxygen-poor blood goes into the lungs and through the lung capillaries after leaving the heart. It does so to be oxygenated by the lungs. The oxygen in the lungs comes from the air we breath. Once the blood is oxygenated, it goes back into the heart, to be pumped back into our bodies for distribution. 
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A carbon Atom can bond with four other atoms because
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A carbon atom has four electrons in it’s balance shell. as the maximum number of electrons that can be within the second shell of electrons is eight, it is able to bond with four other atoms in order to have a full shell of electrons.

hope this helps :) (please mark brainliest if right!)
5 0
2 years ago
Which explaims why it is important to eat full healthy meal
Ksju [112]

Answer:

Explanation:

Eating well is fundamental to good health and well-being. Healthy eating helps us to maintain a healthy weight and reduces our risk of type 2 diabetes, high blood pressure, high cholesterol and the risk of developing cardiovascular disease and some cancers.

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What is the mass of stem cells produced in the first few days after fertilization called?
Mars2501 [29]
It's called Morula!!!
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