<span>A substance that is made of atoms of more than one type bound together is called a <span><u>compound</u>.
</span>A compound is a</span><span> substance consisting of atoms or ions of two or more different elements in definite proportions joined by chemical bonds into a molecule. </span><span>
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Answer:
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The answer your looking for is B different patterns of gene expression
Hydrogen,ammonia,methane,water
