Answer:
Similar organisms have differences that help them adapt to their environments. Many organisms have similar body plans. Bodies are set up in pretty much the same way, because they are descended from a common ancestor. The logical reason for why we share so many genes with other life is because all life is related, and species bring along much of their genetic material when they evolve into new species. The longer species have to evolve from their ancestral species, the more differences build up in their genomes.
Explanation:
As organisms adapt and evolve, not everything about them changes.
