1. All living things must get rid of by-products that are not needed, like gases, liquids, or solids.

Excretion

Explanation:

Excretion, the process by which animals rid themselves of waste products and of the nitrogenous by-products of metabolism

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delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.