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प्रश्न
There has been an increase in the number of chambers in heart during evolution of vertebrates. Give the names of the class of vertebrates having two, three or four-chambered heart.
टीपा लिहा
उत्तर
Two chambered heart: Chondrichthyes and Osteichthyes
Three chambered heart: Amphibia and Reptilia
Four chambered heart: Aves and Mammalia
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Subphylum -Vertebrata/Craniata - Class: Reptilia
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