They are both important because mechanical has to do with physical - cause mechanical means physical, so chewing your mouth is physical (you break your food into smaller pieces physically). And then chemical digestion is when food and saliva mix together. They happen when breaking down food into nutrients - enzymes. Enzymes are important for that process, because they make a nutrient.
Hope this helps!!
I believe the answer is D, Cells get energy by taking in nutrients from food. Correct me if I'm wrong.
A stupid mistake made from the very beginning
Answer:
astronomical unit (AU) and light years
Explanation:
A gene in an egg cell inserts two extra base pairs!!
