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Mashcka [7]
3 years ago
10

The four essential elements for life are

Biology
2 answers:
sertanlavr [38]3 years ago
7 0
The answer is a
Hope this helped

g100num [7]3 years ago
3 0
<span>
A. carbon, hydrogen, oxygen and nitrogen
These four elements make up almost 96% of the human body.

Hope this helps!</span>
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Damage to what structure may result in a heart murmur?
Sever21 [200]

Answer:

Atrioventricular valves.

Explanation:

Heart is the muscular organ of the body and acts as the pumping organ of the body. Human heart is not bigger than the fist and the human heart is divided into four chambers.

Heart murmur may be defined as the swishing sound that are made during the blood flow. This represent the heart problem. The bicuspid valve of heart is atrioventricular valve. The damage in the atrioventricular valve causes the heart murmuring.

Thus, the answer is atrioventricular valves.

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How can a female reproduce at a time when there are no males available for fertilization?
Arte-miy333 [17]

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Dodo.

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2 years ago
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8 0
3 years ago
What is not considered biomass? a Water b Corn C sugar cane D wood
Vitek1552 [10]
<span>The correct answer is A. water. That's because water's chemical composition is such that it can't be decomposed and turned into a fuel. Unlike Corn, sugar cane, and wood, it can't be used to power machines. The other ones are organic and can be used as biofuel, while wood can even be used in the form of coal as coal is nothing else than wood.I hope that my answer is helpful! Let me know if you need something more :)</span>
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3 years ago
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