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Marta_Voda [28]
3 years ago
15

Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It

contains 21% carbon dioxide. It blocks all radiation from the sun.
Biology
1 answer:
liberstina [14]3 years ago
3 0
The answer is 21% oxygen
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Some bacteria viruses parasites and fungi can cause an illness. these are known as?
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Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites.

<h3>What are viruses bacteria and parasites?</h3>

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What are the causes of disease?

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5 0
2 years ago
Which of the following is the most likely cause for future water shortages? a. global warming b. increased agriculture c. water
saveliy_v [14]
Water pollution is answer.
8 0
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Read 2 more answers
What two (or more) systems are involved in this process?
Burka [1]
<span>Touching a hot pan and yanking your hand away: Pain and reflexes

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Blushing: The rising of your blood temperature and nervousness.

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3 years ago
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