First slide

Classification of Animals

Question

Which of the following is a poikilotherm with four-chambered heart?

Moderate

A

Psittacula
B

Hemidactylus
C

Pteropus
D

Crocodylus

Solution

Crocodiles (e.g., Crocodylus) are poikilotherms with four-chambered heart. Hemidactylus is also a poikilotherm but its heart is three-chambered with an incompletely divided ventricle. Pteropus (Mammalia) and Psittacula (Aves) are homeotherms with four-chambered heart.

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