Students in Ms. King's science class are researching the history of the cell theory and will write a blog to show what they have learned. Which of the following is the best choice for the introductory sentence? A. A scientific theory, like cell theory, does not change.

B. A hypothesis, such as one about cells, usually becomes a theory.

C. Scientific theories, like those written about cells, are not as important as scientific laws.

D. Scientific theories, such as cell theory, are based on well-supported observations of nature.

A hypothesis, such as one about cells, usually becomes a theory.

A

Explanation:

I got it right on my test

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:

the cell cycle is the final answer! : )