23. I am a crocodile. I have 4 chambered heart. Which phylum do I belong to
(a) mammal
(b) Pisces
(c) amphibian
(d) reptilian
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Answer:
your answer isreptilian
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Vertebrates have evolved a muscular heart to pump blood to body parts. Fishes have two chambered heart. Birds and mammals have four chambered heart, having two auricles and two ventricles. Reptiles, except crocodile, have three chambered heart. Crocodiles have four chambered heart. Thus Dolphin being a mammal has four chambered heart. Salamander being an amphibian has a three chambered heart.
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