1. The central nervous system including brain and spinal cord.
2. The peripheral nervous system including nerves coming out from the brain and spinal cord, i.e., cranial nerves and spinal nerves.
3. The autonomic nervous system including sympathetic nervous system and parasympathetic nervous system.
C. Enzymes increase the rate of the chemical reactions carried out during metabolism.
What is Mutation
The major source of the genetic diversity among microorganisms upon which natural selection operates is Mutation.
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It is convergent revolution