Please use the following data table of mesodermal patterning and homeobox genes to help you reconstruct a most parsimonious tree of basal Animals: "1" means the gene is present in that taxon, and "0" means it is absent. Please use these taxa as tips on your tree and indicate where on the tree each gene evolved. Mesodermal patterning genes and Homeodomains (Homeobox genes) Taxa COL TALE AMPA POU Erb-B HNF PROS SINE CASK GRIP S-50 recep. recep. PRD Bilateria 1 1 1 1 1 1 Choanoflagellata 1 1 1 1 1 1 1 1. Cnidaria 1 1 1 Ctenophora 1 1 1 1 1 1 1 Placozoa 1 1 1 Porifera 1 Fungi 1.

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Animal Diversity

Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.

Platyhelminthes

Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.