Fleas bite the skin of dogs, suck their blood, and cause them to itch. The fleas,
in turn, get food and a warm home. This is
an example of

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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

why do you want to cheat? i dont take it, so i dont know.

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