Answer:C
Explanation:
The arteries are not a cell bc that is too simple a tissue is also too simple its not a system bc arteries are not a lot of organs working together so its C
the air's oxygen is partially replaced by carbon dioxide. This is because of the gas exchange that occurs so we can live.
correct answer is there are fewer structures in the cell on the top
and the structures in the cells are similar
Extinction would be the least likely outcome
