Heart with incompletely divided ventricle is found in

Amphibians

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Reptiles

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Crocodiles

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Fish

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Solution

The correct option is B Reptiles
Vertebrates have a complex circulatory system with a fully developed heart. The heart is divided into several chambers to separate the oxygenated from deoxygenated blood.
Fishes have two chambered with one auricle and one ventricle, amphibians and reptiles have a three-chambered heart with two auricles and one ventricle. The ventricles have a partial septum which incompletely divides the heart which leads to mixing of oxygenated and deoxygenated blood.
So, the correct answer is option B.

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Incomplete divided ventricle can be seen in the heart of

(1)	Cartilaginous endoskeleton	Chondrichthyes
(2)	Viviparous	Mammalia
(3)	Possess a mouth with an upper and lower jaw	Chordata
(4)	3-chambered heart with one incompletely divided ventricle	Reptilia

The left ventricle of heart pumps blood into:

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