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Lerok [7]
4 years ago
5

Among the subsystems which is composed of mixture of gases that surrounds the earth​

Biology
1 answer:
jekas [21]4 years ago
8 0

Answer:atmosphere

Explanation:Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen and 21% oxygen 0.97% argon and carbon dioxide 0.04% trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air.

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Why are humans not an invasive species
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Answer:

Originally Answered: Are humans considered an invasive species? No, because the term is generally applied only to species that were introduced to an ecosystem and cause harm. Humans were not introduced to any ecosystem. Instead, humans underwent what is called a 'natural range expansion.

Explanation:

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4 years ago
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saveliy_v [14]
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How can the presence of bacteria in the environment be proven
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4 years ago
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STatiana [176]

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<h3>What is fetal circulation?</h3>

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The foramen ovale, which carries blood from the right atrium of the heart to the left atrium, and the ductus arteriosus, which takes blood from the pulmonary artery to the aorta, are the two shunts that bypass the lungs.

Through the placenta, the mother's blood supplies the fetus with nutrition and oxygen. The enhanced blood divides into three branches as it travels via the umbilical cord to the liver.

Learn more about fetal circulation with the help of the given link:

brainly.com/question/7191531

#SPJ4

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may be the answer is

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