Base substitutions, deletions and insertions.
Answer: =<u>Convergent</u> evolution
Explanation: <u>Convergent</u> evolution occurs when organisms share a trait that originated in an ancestor but changed over time in different populations.
The oxygen in you lungs are of a higher concentration than it is in your blood This process is through the use of passive transport.<span>Your blood is then returned to the heart and pumped throughout the body. Because your blood has more oxygen in it than your cells do the blood through the use of passive transport again give the oxygen to the cells.</span>
