<span>The muscles that can flex, extend and abduct the arm, are the voluntary muscles, such as the biceps, triceps, and delts. These muscle play a crucial role in mobility of the arm.</span>
<span>The models have their own purpose, which is to gain a better understanding of the world. Therefore the statement is true.
Hope this helps
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Is this the structure of DNA?
A macromolecule is a large molecule containing many atoms. The four type are carbohydrates, lipids, proteins, and nucleus acids.
