Describe how animal bodies (from sponges through the lophotrochozoans) have increased in complexity through the course of...

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Biology

Describe how animal bodies (from sponges through thelophotrochozoans) have increased in complexity through the courseof animal evolution. Your answer should include examples fromseveral different lineages.

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The animals are multicellular eukaryotes that often termed as metazoans bearing body with highly organized tissue or organ system and digestive tract with a specialized cellular network During the evolutionary process these lower eukaryotes bearing simplified cellular organization gradually developed into highly complex modernday multicellular animals If we think of these metazoans they can be classified into two categories or lineages Eumetazoa eumetazoans bearing specialized tissue system and Parazoa without any tissue system The lineage Parazoa involves phylum Porifera eg Sponges that further classified into three distinct groups such as Hexactinellida Demospongia and Calcarea Another lineage called Eumetazoa was classified into two sublineages based on cleavage and symmetry Bilateria and Radiata The bilateral symmetry and See Answer

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