First slide

Classification of Animals

Question

Which one of the following statements about crocodile, crow and camel is correct?

Difficult

A

Crocodile has three-chambered heart whereas the other two have four-chambered heart
B

Crow is oviparous whereas the other two are viviparous
C

Crocodile is cold-blooded whereas the other two are warm-blooded
D

All the three animals exhibit external fertilization and direct development

Solution

Crocodile is a reptile. Crow is a bird. Camels is mammal.
Four-chambered heart – crocodile, crow, camel
Oviparous – crocodile, crow; viviparous – camel
Cold-blooded – crocodile; warm-blooded – crow and camel
All the three animals exhibit internal fertilisation and direct development.

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