The scientist that presented that deoxyribonucleic acid contained equal quantities of certain nitrogen bases is Chargaff. In addition, Chargaff’s rules state that deoxyribonucleic acid from any cell of all organisms must have a 1:1 ratio which is base pair rule of pyrimidine and purine bases and more precisely that the total of guanine is equal to cytosine and the total of adenine is equal to thymine. This configuration is found in together strands of the deoxyribonucleic acid.
This is more of a personal question about how well you know yourself, no one can answer this for you.
We haven't found evidence of life yet.
But it would be dependent on geography and planet structure because not all places are easy to live in.
This process is is called controlled breeding. This allows the farmer to breed the offspring in such a way that only the genes that he wants present are produced in the offspring.
