The presence of gills slits, in the embryos of all vertebrates supports the theory of
A
Metamorphosis
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B
Biogenesis
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C
Organic evolution
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D
Recapitulation
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Solution
The correct option is B Recapitulation
Recapitulation theory says that embryological development repeats path of evolution. Gill slits are present in the fishes and the aquatic amphibians and from them gradually the reptiles and mammals have evolved.