Explain the roles of chemical and mechanical digestion in preparing food for use in the body.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

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tobey

the correct answer is:

a population changes in response to a change in the environment.