Use the vocabulary words listed below to create a detailed description of The DNA Structure make sure you explain their relationships to each other. (Limit your answers to 3 to 5 sentences.) As you use a word from the bank cross it off. Your score on this assignment will also depend on your punctuation, spelling, grammar and correct sentence structuring (using a subject, verb and object in each sentence.)
Word Bank
Nucleotide Nitrogenous Bases Thymine
Phosphate group Alternating Guanine
Double Helix Universal code Cytosine
Hydrogen bonds Adenine Deoxyribose (sugar)

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 true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

not: both offer magnification to the atomic level.