Sorry for the other guy. He was rude. Here's the answer:
Animals excrete CO2 by cellular respiration. Since any living things besides plants can't break down CO2, it just gets put back into the environment. I hope I helped you :)
Well, what do you need help with?
Answer:
The plasma membrane forms a barrier which is phospholipid bilayer on the outer and inner surface and compartments on the inferior
The answer is C i hope it’s right but i searched up
