Ascientist is studying a unicellular organism. the organism normally looks like image a. then the scientist places the cell in two different solutions. in the first solution, the cell changes to look like image b. in the second solution, it changes to look like image c.
which statement describes the solution and process that would cause a cell to look like the cell labeled b?
a.
too much sugar water moved out of the cell.
b.
too much water moved into the cell.
c.
too much saline moved into the cell.
d.
too much water moved out of the cell.

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:

human-caused climate hope this