The central nervous system includes the brain and spinal cord.
Answer:
The answer is Physical. Physical immunity occurs when a person immune system responds to antigen.
Explanation:
Answer: Asexual
Explanation: Since only one parent is needed, asexual reproduction is more beneficial. It is a "simpler" (in terms of not needing two mates to fornicate) and causes species to reproduce at a faster rate
Option D order includes fewest organisms
