Describe the components of the peripheral nervous system and central nervous system and explain how they work together in your body.

The central nervous system (CNS) is composed of the brain and the spinal cord and functions mainly to process information and determine the correct response.

The peripheral nervous system (PNS) is composed of all the sensory and motor neurons of the body and functions to gather information and to control the actions of our bodies.

The PNS takes in information through sensory neurons then sends it to the CNS to be processed. After  processing, the CNS  "tells" the PNS what to do e.g. what muscles to flex, whether the lungs need more oxygen or which limbs need more blood, and any other  biological processes. The PNS then makes it happen through muscle control.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

bc blah

explanation:

bc blah