Question

. 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?

Answer 1

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.