Unit 5 Individual Project part 2 - Unit 5 Individual...

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Unit 5 Individual Project Doris Escalera American Intercontinental University 1. Which phyla lack organs? What type of symmetry do they have? The phyla that lack organs are the Cnidaria which in this category are the hydra, anemones and the jelly fish. The type of symmetry’s is the sponges and jelly fishes which are both asymmetrical and the radical. Phylum Porferia is the sponges in which lack organs and have no symmetry on any axis. Cnidaria does lack organs yet have tissue layers and are radically symmetric. 2. List all of the phyla that show cephalization. Platyhelminthes Nematoda Annelida Mollusca Arthropoda Chordata 3. Do all organisms on the table have 3 germ layers (endoderm, ectoderm, and mesoderm)? If not which phyla have fewer than 3 germ layers? Not all phyla have 3 germ layers; Porferia does not have any germ layers. The Cnidaria has only 2 germ layers. All the other animals have it such as the flatworms, roundworms, mollusks, annelids, echinoderms, chordates, and the athropodas all have three layers. 4.
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This note was uploaded on 08/02/2011 for the course ENG COMP 105 taught by Professor Thompson during the Fall '11 term at American InterContinental University.

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Unit 5 Individual Project part 2 - Unit 5 Individual...

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