How does study of embryo prove organic evolution? State Hackle’s principle on the basis of this.

How does study of embryo prove organic evolution? State Hackle’s pri

1.	How does study of embryo prove organic evolution? State Hackle’s principle on the basis of this.
Answer» When we see fish, turtle, chicken, human embryo’s, early stages in them appears almost identical. This proves that the ancestors of all the vertebrates were almost identical. This proves that ancestors of all vertebrates resemble with fish and their development is certainly in order. Haeckel Theory: According to this theory, ” Every organism, in its development, repeats its organic history”. This theory is known as Theory of Recapitulation.