In an experiment, the factor that changes in response to the manipulation of the
independent variable is the
o experimental group
o constant
o control group
dependent variable

The correct answer is D. Dependent variable.

Explanation

When an experiment is being carried out, it is necessary to clarify that there must be two variables, one of them is independent and the other is a dependent variable. The first, as its name implies, is a fixed variable, which does not depend on any condition of the experiment and cannot be changed or modified. On the other hand, the dependent variable is one that changes from different factors, such as temperature, chemical compounds, elements, among others that are independent variables. Therefore, the correct answer is D. Dependent variable.

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: