Ventilation is the process which the air moves in and out of the lungs. Diffusion is the movement of gases without the use of energy and or effort by the body. Hope this helps!:)
The myelin sheath is the layer of fat cells that insulates most axons and speeds up the transmission of nerve impulses.
Answer: B
Explanation: The other answers are talking about similarities among different species.
The answer to this question is A
Answer:
Genetics take a long time to mutate.
Explanation:
