The answer is aerobic. Although cellular respiration can happen anaerobically and aerobically, the question states that it requires oxygen. Therefore, it is aerobic.
A normal heart rate ranges between 60-100 beats per minute. The higher the heart rate is, the faster the blood is pumping through the heart. When exercising a persons heart will be higher because the brain and the muscles in the body are in need of oxygen so the heart needs to pump faster in order to sustain optimal performance.<span />
Base substitutions, deletions and insertions.
I disagree because although recycling is good, Earth firstly is not a closed system and new matter enters the environment all the time, such as comets.
Explanation:
the oxygen that fish breathe is not the oxygen in H2O.Instead,the fish are breathing O2(oxygen gas) that is dissolved in water. ...Plus water is a lot heavier and thicker than air,so it takes a lot more work to move it around. please mark me braneliest
