EvolutionHard

Question

The presence of gill slits, in the embryos of all vertebrates, supports the theory of

Options

A.biogenesis
B.recapitulation
C.metamorphosis
D.organic evolution

Solution

″The theory of recapitulation″ or ′Biogenetic law′, propounded by Haeckel states that an indiviual organism in its development (ontogeny) tends to repeat the stages passed through by its ancestors (phylogeny). During the life history of frog, tadpole larve resembles fishes, the ancetors of Amphibia. The presence of gill clefts in vertebrate embtyo provides a strong evidence in support of organic evolution.

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