It begins in the mouth. You produce saliva when you chew. This helps break down the food so it can get down to your stomach.
Answer:
Cell division
Explanation:
Cells division leads to two daughter with the same genetic material as their "mother" cell.
The answer is B. Natural Selection
Answer:
D.
Explanation:
energy can be transformed into different forms, but is does stay the same because of energy conservation.
