The new substances that are formed during a chemical reaction are called the products. The original substances are called the reactants. For example, when hydrogen gas is added to oxygen gas and ignited, the new substance water is formed. The reactants are hydrogen and oxygen.
-Diane:)
The answer to number one is B, and the answer to two is D.
The top level of the pyramid
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Answer:
Adaptation is the evolutionary process whereby an organism becomes better able to live in its habitat or habitats.
