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Grades of Organization

Which is the ...

Question

Which is the smallest taxonomic group having cranium, vertebral column, ventral heart, pulmonary respiration and two pairs of legs?

A

Chordata

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B

Gnathostomata

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C

Vertebrata

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D

Tetrapoda

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Solution

The correct option is D Tetrapoda
Superclass Tetrapoda comprises the first four-limbed vertebrates which include amphibians, reptiles, mammals, birds and some extinct fishes. It is characterized by the cranium, vertebral column, ventral heart and pulmonary respiration. Hence, option D is correct.

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