Explain the function of embryonic stem cells, stem cells in animals and meristems in plants

Explanation:

Embroyinc stem cells can differentiate into any type of cell.

So since they can differentiate into any cell they can treat a wide range of disease.The body is unlikely to reject it.The embryonic stem cells and grow into a whole replacement organ

Stem cells can differentiate into certain type of cell.Ie blood cells.This is found in the bone marrow..There is an established technique to treat diseases.Relatively safe and donor can recover quickly.Less ethical issues so adults would give the stem cells for medical treatment.

Meristem are found in the region of shoots and roots.They can produces/clone whole no plants and differentiate into any cell.It can clone plants with desired characteristic I.E be disease resistant.Very fast process low cost and produce large numbers of plants

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:

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.