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

A-Ostracodermi, B-Cyclostomata, C-Pisces, D-Tetrapoda

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A-Cyclostomata, B-Ostracodermi, C-Pisces, D-Tetrapoda

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A-Ostracodermi, B-Tetrapoda, C-Cyclostomata, D-Pisces

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A-Pisces, B-Ostracodermi, C-Tetrapoda, D-Cyclostomata

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Solution

The correct option is A A-Ostracodermi, B-Cyclostomata, C-Pisces, D-Tetrapoda
Subphylum Vertebrata is divided Into two divisions. They are agnatha (jawless) and gnathostomata (with jaw). Agnatha are further divided into two classes-Ostracodermi, which is 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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Question 20
In which of the following vertebrate group/groups, the heart does not pump oxygenated blood to different parts of the body?

(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
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Question 5
Which among the following is exclusively a marine animal?

(a) Porifera
(b) Echinodermata
(c) Mollusca
(d) Pisces

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