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Question

Under subphylum vertebrata how many classes are included?

A
Seven
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B
Two
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C
Four
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D
Three
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Solution

The correct option is A Seven
Introductory flowchart


Flowchart description

On the basis of jaw bearing animals the subphylum vertebrata is divided into
  1. Gnathostomata - it comprises 6 classes (chondrichthyes, osteichthyes, amphibia, reptilia, aves and mammals).
  2. Agnatha - it comprises a single class (cyclostomata).
Thus subphylum vertebrata comprises seven classes.

Final answer

(d) seven


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