Answer:
what do you need help with?
Explanation:
Answer:
Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.
Explanation:
Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.
<span>B. energy is lost at each level as heat, which increases randomization
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The first answer is volcanoes
The second answer is They move because of convection currents in the mantle
An antigen causes the body to make antibodies.