TIME REMAINING 59:00
What is natural selection?
O a process that selects variations that help with survival and that spreads the variations to more offspring
a process through which nature selects an individual within a population for extinction
a process that causes all populations to gradually increase in size
O a process that causes random variations to appear in the offspring of every generation

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.