What happens in nuclear fusion reaction is that<span> four hydrogen </span>nuclei combine in a <span>proton-proton </span><span>fusion </span><span>to form one </span>helium atom. In the process of fusing to form the helium atom, some of the mass of the hydrogen atoms is converted into vast amounts of energy, which is released.
The largest is the Biosphere
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Animals and plants need nitrogen to build amino acids in proteins, which are the building blocks of life. Unlike oxygen, nitrogen cannot be absorbed directly from the air by animals and plants.
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The organisms at the base of the food chain are photosynthetic.
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