Physiological differences between endothermic and exothermic organisms

"Thermic", refers the heat.
"Exo" means outside and "endo" means inside.
Which means, an endothermic reaction pulls heat into an object or area, while and exothermic reaction expels heat.
The difference between endothermic and exothermic reactions lies in the words themselves.

Only algae, oak trees, and bermuda grass produce atp by photosynthesis i am almost positive