Answer:
regulators
Explanation:
regulators use their metabolism to control their internal environment
Answer:
B. CO2 out
Explanation:
The excretion is the process of removal of the waste product from the body. The carbon dioxide is the byproduct of the aerobic respiration, which is carries from the tissues and the lungs by blood. In the lungs at alveoli, the carbon dioxide is transferred from the blood to the lungs and released out through the nostrils. Hence, the out of the carbon dioxide represent excretion through lungs.
Answer: choice A
Explanation: hope this helps
SORRY IF IM WRONG
Answer:
what is the question you basicly just gave us a paragraph to comment on
Explanation: