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Question

Study the following organism, their character and group.
A. Petromyzon - Fish like but without paired fins – Agnatha
B. Amphibia - First tetrapoda - Amniota
C. Ascidia – Solitary – Urochordata
D. Amphioxus – Fish like burrowing - Urochordata
Which of the above two are correct?

A
A & B
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B
A & D
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C
A & C
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D
C & D
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Solution

The correct option is C A & C
Petromyzon belongs to class of Cyclostomata of division Agnatha (without jaws). They are fish like but the body is devoid of scales and paired fins.

Amphibians were the first tetrapods but they are not amniotes. Amniotes lay eggs with shell and amniotic fluids. Amniotes consist of tetrapod vertebrates comprising the reptiles, birds, and mammals.

Ascidia are solitary which belong to subphylum Urochordata.

Amphioxus belongs to subphylum Cephalochordata.

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