Both mitosis and meiosis begin with a diploid cell that contains replicated chromosomes. explain the main differences between these two processes and what types of daughter cells produced by each.

Mitosis is a cell division in which one diploid cell divides into two identical diploid cells. On the other hand, a cell division which results in the reduction of chromosome number by half  in daughter cells is called meiosis. Meiosis consists of meiosis I and meiosis II. After meiosis I, the number of chromosomes is reduced by half and the result is two haploid cells. Meiosis II is actually analogous to mitosis. So, in meiosis II, haploid cell divides into two identical haploid cells. In total, meiosis results in four haploid cells while mitosis results in two diploid cells.

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:

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.