er:
Explanation:
In the lungs CO2 is removed from the blood and send out the body where we exhale
Answer:
Explanation:
1st question is humans eat other organisms to get nutrients they need to survive.
2nd one is Eukaryota domain
Aerobic respiration is producing of cellular energy involving oxygen.
Anaerobic respiration is respiration using electrons through molecular oxygen.
They create competition with some certain niche