Question

explain evolution with the help of its embryological evidence.​

Answer 1

Answer:

Embryological Evidences

The study of comparative embryology shows common pattern of development.

➡️The principles of embryonic development were given by von Baer.

➡️ Ernest Haeckel propounded The theory of recapitulation or Biogenetic law, which states that an individual organism in its development tends to repeat the stages passed through by its ancestors i. e, ontogeny recapitulates phylogeny.

➡️ This means that the life history of an animal reflects it's evolutionary history. For example :- during the life history, frog's tadpole larva resembles fishes, the ancestors of amphibia. The presence of gill clefts in all vertebrate embryos including human provides a strong Embryological evidence.

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Answer 2

Biogenetic law and recapitulation theory given by Haeckal provide direct evidence of organic evolution. According to it, the embryonic stages of the animals are similar to their adult ancestors. AT the time of formulation of recapitulation theory, Haeckal considered following principle of embryology given by Von baer-

*During embryonic development general characters appear earlier than the specific characters.

*During development variations in different animals appear slowly.

*The specific features appear in the end of the embryonic development.

*The initaila stages of embryonic development are similar in different animals.