If DNA has the code ATGC, what is the complementary code in mRNA?

The complementary code for mRNA would be UACG.

Explanation:

DNA pairing has the following pairs: A-T and C-G

RNA pairing has the following pairs: A-U and C-G.

In this case, we would use the RNA pairing rules and find the complementary pairs for the DNA sequence. So the A will pair with U, T will pair with A, G will pair with C, and C will pair with G, giving the complementary mRNA code as UACG.

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:

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.