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. What are, and what are the distinguishing characters, of the two major groups of Protostomes? 2. Look at the phylogeny of the Lophotrochozoans. Identify the taxa possessing a lophophore. What does that imply about the evolution (loss or gain) of this trait?

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Answer:

a)Lophotrochozoam

  • Many free living things larvae
  • Several groups has lophophore
  • Nearly all animals are sessile adults

b)Ecdyozoams

  • Phyla where the organisms molt their outer layer for growth.

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