Which of the following would most likely scientists conclude that kidney disease can result from not drinking enough water?

a. inventing new machine that maintain excretory function when a patient is in the hospital

b. comparing the rates of kidney disease reoccurrence in recovering patients who increased their daily water intake vs. those who did not increase their daily water intake

c. asking whether the climate of a kidney-disease patient affects the likelihood of contracting a bacteria that enters the kidneys

d. reading studies about how dehydration affects the functions of the circulatory system and comparing them to studies about dehydration and the respiratory system

B. comparing the rates of kidney disease reoccurrence in recovering patients who increased their daily water intake vs. those who did not increase their daily water intake.

A dehydration can be defined as a condition in which the excessive loss of the body water occurs in the body through sweating, diarrhea, loss of excess water through urine. The loss of water disturb the blood pressure, electrolytic balance, may bring the body in the hyovolemic state and may also cause heart and kidney failure.

Comparing the rates of kidney disease reoccurrence in recovering patients who increased their daily water intake vs. those who did not increase their daily water intake is the correct answer because it is a comparitive study which may show the direct impact of water on the kidney patients. This proves that water is necessary in the recovery of the kidney diseases.            

c. would be the answer : )

explanation:

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: