In the given list how many animals have complete double circulation.
Fish, Alligator, Frog, lung fish, Prawn, Crocodile birds, mammals.

Five

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Four

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Three

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Six

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Solution

The correct option is A Five
Double circulation is the type of circulation in which blood goes through the heart twice. It is mainly found in birds, mammals, and some reptiles and fishes. Hence, out of the options given in the question, alligator, lungfish, crocodile, birds, and mammals have double circulation.
So, the correct answer is 'Five'.

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Similar questions

An animal having double circulation in a three-chambered heart is :
(a) fish
(b) snake
(c) deer
(d) sparrow

Explain the advantage of the complete partition of ventricle among birds and mammals and hence leading to double circulation.

Which one of the following sets of animals share a four chambered heart?

(a) Amphibian, Reptiles, Birds

(b) Crocodiles, Birds, Mammals

(d) Lizards, Mammals, Birds

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