Gill clefts and notochord appear in embryonic development of all vertebrates from fishes to mammals.

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6.Evolution

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Gill clefts and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of

A

Recapitulation

B

Metamorphosis

C

Biogenesis

D

Abiogenesis

Solution

'Ontogeny repeats or recapitulates phylogeny’ is given by Ernest Haeckel

Standard 12

Biology

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