The answer to this one is D
Answer:
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Carbon moves through Earth’s ecosystems in a cycle referred to as the carbon cycle. It is through carbon dioxide gas found in Earth’s atmosphere that carbon enters the living parts of an ecosystem.
Explanation:
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Answer:
1. Skin Creams
Explanation:
An independent variable is the only variable that is changed while the rest is kept the same. In this setup, the doctor is using different creams on the same patient with the same skin condition so the independent variable is the skin cream and not the skin condition.
In eukaryotic cells DNA is in a nucleus where are in prokaryotic cells DNA is free