Answer:
Through the thin walls of the capillaries, oxygen and nutrients pass from blood into tissues, and waste products pass from tissues into blood. From the capillaries, blood passes into venules, then into veins to return to the heart.
Explanation:
Each experiment reveals a different piece of information that is needed to develop the theory.
Answer:b
It will only be found in some cells because when a mutation is formed it will most likely not be able to spread
