Which of the following classes of animals pos | vedclass

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(B) The correct answer is $B$ (Aves).In the class $Aves$ (birds),the heart is completely four-chambered,consisting of two atria and two ventricles.Unl

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Aves

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(B) The correct answer is $B$ (Aves).In the class $Aves$ (birds),the heart is completely four-chambered,consisting of two atria and two ventricles.Unlike mammals,where mature $RBC$s are enucleated (lacking a nucleus),the $RBC$s in birds are nucleated.Reptiles (except crocodiles) have a three-chambered heart,and amphibians also have a three-chambered heart.Mammals have a four-chambered heart,but their mature $RBC$s are non-nucleated.

Which of the following classes of animals possess a four-chambered heart and nucleated $RBC$s?

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