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.
I wanna say D, but I’m not entirely sure
Cancer is a mutation of multiple cells through the cell cycle. cancer doesn’t only effect one cell, but effects many
The word that you are looking for is complex.
