D JURASSIC PERIOD BECAUSE THEY CAME UP WHEN DINOSAURS CAME
Food is the most important source of chemical energy for living things. The chemical energy in food is converted, or changed, by the body into moving mechanical energy and heat energy. People have invented ways to use the chemical energy of substances to power machines.
Carbon dioxide is released by animals.
Answer:
Yes, dogs do have a internal organization
Explanation:
(division of labour)
