Quick
which of the following statements best explains the role of meiosis in reproduction? select one:
a. meiosis makes it possible for a zygote to have the correct number of chromosomes. b. meiosis increases the chances of fertilization because it produces four daughter cells. c. meiosis results in offspring with genotypes that are not exact copies of the parents. d. meiosis allows chromosomes to exchange genetic material through crossing over.

d

Explanation:

crossover only tskes place during meiosis

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 answer is c a tornado