Which best describes the cell theory?
1.scientists know all there is to know about cells, so the cell theory will not change.
2.as technological advancements are made, the cell theory may change.
3.a theory, once formulated, cannot be changed.
4.the development of a synthetic cell has caused the cell theory to change.

2, because a theory is not a law that can not be changed, and new evidence can change a theory.

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.

hope this

tobey