Populations evolve and individual organisms do not. Evolution occurs through natural selection and survival of the fittest as populations evolve traits that better suit their environment.
I believe it comes from the groups of dNTPs. ( hydrolysis of phosphate )
Could you be more specific? I can't really answer the question when it's written like that (no offense).
Answer:
The movement of food through the gastrointestinal tract by the contraction of muscles is called Peristalsis.
