<span>The two ways atoms are formed is by elements, combine to form chemical compounds that are often divided into two categories. Metals often react with nonmetals to form ionic compounds. These compounds are composed of positive and negative ions formed by adding or subtracting electrons from neutral atoms and molecules</span>
Photosynthesis and respiration<span>.</span>
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the study of genetics. all living things require energy
Answer: The answer is rock simmilarites hope this helps!
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