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प्रश्न
Tell any two structural features in vertebrate embryos that support organic evolution.
अति संक्षिप्त उत्तर
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उत्तर
Embryos of all vertebrates develop notochords and gill-clefts. Notochord is partly or wholly replaced by the vertebral column in the adults of all vertebrates; gills-clefts close in the adults of some amphibians and all reptiles, birds, and mammals.
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