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Which among the following is odd?(a) Urochordata(b) Cephalochordata(c) Vertebrata(d) AgnathaI had been asked this question in exam.The query is from Classification of Animal Kingdom into Different Phylum-2 in portion Animal Kingdom of Biology – Class 11

Answer»

Right answer is (d) AGNATHA

The best I can explain: 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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