Answer:
it orbits the Earths atmosphere
Explanation:
<span>When a plant undergoes photosynthesis, one of the by-products is oxygen or CO2.
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Through the process of global warming
Answer:
thet grew it and used it for trade
Explanation:
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The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.