Justin often engages in binge drinking on the weekends. this behavior puts him at risk for a dangerous sleep disorder in which the brain and the respiratory muscles do not communicate properly. it's known as

Central sleep apnea

Explanation:

Central sleep apnea is a sleeping disorder in which the breathing repeatedly stops and starts. It occurs because the brain do not send the signals properly to the respiratory muscles that controls the breathing. Heart failure, stroke and sleeping at high altitudes are some of the reasons which may cause this sleeping disorder. Treatment is treating existing conditions using a device to assist breathing.

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: