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Textbook Expert
Textbook ExpertVerified Tutor
28 Oct 2021

Background and context

Animals can be classified on various criteria like
• Presence of body cavity (coelomate, acoelomate, pseudo- coelomate)
• No. of germ layers (triploblastic and diploblastic)
• Symmetry (radial or bilateral)
• Origin of mouth (protostomes or deuterostomes)

 

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