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When an organism's mouth lacks jaws, it can be classified under

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Important Questions on Animal Kingdom

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Which of the following statement is incorrect w.r.t. class Cyclostomata?
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Retrogressive metamorphosis is seen in
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In which of the following, is the notochord absent?
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Which of the following is a common feature of Amphioxus, frog, fish and crocodile?
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In which of the following fish is the skin tough and has minute placoid scales?
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Which of the following is not a characteristic feature of a cartilaginous fish like Scoliodon?
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A bony fish can be differentiated externally from a cartilaginous fish by presence of