Which one of the following is an example of recapitulation theory?

Extra-embryonic membrane in reptiles

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Larva of cockroach

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Placenta in mammals

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Gill cleft in human fetus

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Solution

The correct option is C Gill cleft in human fetus
The theory of recapitulation was given by Ernst Haeckel's. He described that in embryo development stage, animals go through stages resembling or representing successive stages in the evolution of their remote ancestors. For example, the pharyngeal grooves between the pharyngeal arches in human embryo is resembled to gill slits of fish. Hence, the correct answer is option D.

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