Explanation:
rewatch the video your teacher provided on edunity
Exothermic reactions occur outside of the object, while endothermic occur on the inside.
Answer:
Basically, when organisms combine stuff to make different stuff and get rid of other stuff.
Explanation:
cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
This isn't possible except you have a system where there isn't competition and the survival of the fittest in the aspect of the food chain