Two molecules are formed, each with one original side.
This is because the starting DNA molecule undergoing mitosis splits in half and the other half is completed by free nucleotides using the enzyme Polymerase.
Oxygen and Carbon Dioxide are the two gases being exchanged in the alveoli. Carbon Dioxide diffuses blood into the air, and oxygen diffuses from the air in the alveoli into the blood.
Answer:
the sun and earth are in different places but im not 100% sure bout it