I believe it would be proteins
A non-living system would be a machine, such as an electrical system, air conditioning, etc. and a living system would be an animal, person, plant, etc.
Nerve cells because skin cells keep dividing when you loose skin. Epithelial cells also divide when you loose others.
All mackerel live in the water because all fish live in water and mackerel is a fish
Answer:
fire is your answer i hope this helps
