In which of the following ways are dna and mrna different?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Is genetic diversity the same as genetic variation?

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.