Why is the nucleus important? A. It is useful for making cell energy.
B. It contains and protects the cell's
DNA.
C. It is the site of protein synthesis.
D. Both A and C

it contains and protects the cell's DNA

B. It contains and protects the cell's DNA.

Explanation:

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