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Go through the following flow chart for division of subphylum vertebrate. Fill the graph A, B, C and D and select the correct option.

A

`{:(A,B,C,D),("Ostracodermi","Cyclostomata","Pisces","Tetrapoda"):}`

B

`{:(A,B,C,D),("Cyclostomata","Ostracodermi","Pisces","Tetrapoda"):}`

C

`{:(A,B,C,D),("Ostracodermi","Tetrapoda","Cyclostomata","Pisces"):}`

D

`{:(A,B,C,D),("Pisces","Ostracodermi","Tetrapoda","Cyclostomata"):}`

Text Solution

Verified by Experts

The correct Answer is:
A
Subphylum Vertebrata is divided into two divisions. They are agnatha (jawless) and gnathostomata (with jaw). Agnatha are extinct and Cyclostomata (e.g., hag fish). Jawed vertebrates are divided into two superclasses-Pisces (true fish) and Tetrapoda (four limbs).
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