It is because that's a place where no one lives so they're safe.
Answer:
A question is never clear
The same copies of the dna with the genes is distributed in all the cells of the body. This makes all the cells of the body to have the same genetic material. In lower organisms, dna replication is necessary for reproduction in order to have the same genes in the progeny.
Sidney W. Fox produced proteinoid spheres, which suggest a possible route from chemical to cellular life.