The concept of organic evolution says that every living being which we see today has a common ancestor. In other words, every life form has originated from the first life form to appear on the earth.
Numerous species of modem times have evolved through various stages through a very long period. Some logic in its favour is as follows.
In spite of so much variation in appearance the skeletons of forelimbs of human, cheetah, fins of fish and wings of bat show the same fundamental structure. This shows that these animals have come from a common ancestor.
All multicellular organisms are composed of eukaryotic cells. Trypsin, the enzyme to digest protein, works in the same way right from the unicellular organisms to humAnswer: DNA, which controls the characters of organisms, work in the same way in all organisms. These facts prove the concept of organic evolution. A careful study of classification of organisms shows that multicellular organisms have evolved from unicellular organisms.
