The presence of temporary gills in the embryo | vedclass

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(B) The presence of temporary gill slits in the embryos of various vertebrates,including snakes,birds,and humans,is a classic example of embryological

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Ancestors of these animals had gills at one stage of evolution.

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(B) The presence of temporary gill slits in the embryos of various vertebrates,including snakes,birds,and humans,is a classic example of embryological evidence for evolution.These structures are homologous to the gill slits found in fish embryos.According to the theory of recapitulation (biogenetic law),these structures suggest that all these organisms share a common ancestor that possessed gills at some stage of its evolutionary history.

The presence of temporary gills in the embryos of snakes,birds,and humans indicates that:

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