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Which among the following is odd?(a) Urochordata(b) Cephalochordata(c) Vertebrata(d) AgnathaI had been asked this question by my school teacher while I was bunking the class.I would like to ask this question from Animal Kingdom in section Animal Kingdom of Biology – Class 11

Answer»

Correct answer is (d) Agnatha

The best explanation: Urochordata, Cephalochordata and Vertebrata are sub-phyla of CHORDATA. These sub-phyla are CLASSIFIED based on the PERIOD of presence of notochord in Chordates. Whereas unlike other three options, Agnatha is a super CLASS in Chordates.



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