Why do amphibians have 3 chambered heart Why do fish have 2nchambered heart

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Solution

In the course of evolution, the fishes developed 2 chambered and amphibians developed 3 chambered heart. One reason for it could be that due to changing environmental conditions and to support the evolved body structure, these organisms developed the multiple chambered heart to adapt successfully with the course of evolution.

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Amphibians have __ chambered heart.

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Question 15
Amphibians do not have the following

(a) Three chambered heart
(b) Gills or lungs
(c) Scales
(d) Mucus glands

How do fishes cope up with two chambered heart where oxygenated and deoxygenated blood mix up unlike mammals which have four chambered heart for efficient flow of blood?

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