Ontogeny Repeats Phylogeny also called Recapitulation theory states that the devlopemental history of an organism repeats it's ancestral characters

Ontogeny Repeats Phylogeny also called Recapitulation theory states that the devlopemental history of an organism repeats it's ancestral characters. eg - The larva of frog that is Tadpole has tails and respire with gills , it represents that amphibians evolved from Fishes. eg - Human embryo has initially 2 chambered heart like fishes , then 3 chambered heart like amphibians , then 3 1/2 like Reptiles and finally 4 chambered heart , it shows our evolution from fishes , amphibians , reptiles.