The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 620 million metric tons of hydrogen each second. The nuclear binding energy curve.
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A desert is a hot wasteland covered with sand and a tundra is a frozen wasteland covered in ice
Answer:
the chemicals needed to produce molecules comes from the food which an organism eat.
Explanation:
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