Charles Darwin suggested that all organism on earth have descended from a common ancestor. The modern technology-enabled humans to sequence the genome of an organism and compared them with each other.
When the human genome was compared with the genome of other organism found the similar sequences in them like - Weed shared 40% of the genome with humans, fruit fly shared 60% genome, mice showed 97.5% genome similarity and chimpanzees showed 98.5 % with the human genome.
On the basis of this, the chimpanzee was found to be the closest species to humans
