This is the image of a vertebrate Petromyzon. Identify which of the following is the correct feature of the organism.
A
It has no coelom
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B
Presence of water vascular system
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C
Jawless
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D
Dorso-ventrally flattened body
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Solution
The correct option is C Jawless Petromyzon belongs to the class Cyclostomata. It is a jawless vertebrate. It has a true coelom. Water vascular system is the feature of Echinodermata. On the other hand, Platyhelminthes have a dorso-ventrally flattened body. Both of them are invertebrates.