Unit 5 Individual Project
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Part 1. There are 9 animals in nine different Phyla. Be sure to look at every page.
| |Animal |Phylum |Dichotomous Key (steps) |Classification |
|1 |[pic][pic] | Cnidaria | 1b, 2a, 3b, 5b | Class Echinoidea |
| | | | | |
|2 |[pic][pic] | Mollusca | 1b, 2b, 6a, 7b, 11a, 12b, | Class Gastropoda |
| | | |13a | |
|3 |[pic][pic] | Annelida | 1b, 2b, 6a, 7a, 8a | Class Clitellata |
| | | | | |
|4 |[pic][pic] | Arthropoda |1b, 2b, 6a, 7b, 11b, 14b, | Class Insecta |
| | | |15b | |
|5 |[pic][pic] | Porifera | 1a | Class Demospongiae |
|6 |[pic][pic] | Echinodermata | 1b, 2a, 3b, 5a | Class Asteroidea |
|7 |[pic][pic] | Chordata | 1b, 2b, 6b, 16b, 18b, 19b, | Class Aves |
| | | |20a | |
|8 |[pic][pic] |Platyhelminthes | 1b, 2b, 6a, 7a, 8b, 9b, | Class Turbellaria |
| |Image Rights: Allen G. | |10a | |
| |Collins and the UC Museum of Paleontology | | | |
|9 |[pic][pic] | Nematoda | 1b, 2b, 6a, 7a, 8b, 9b, | Class Cestoda |
| |Image Rights: Courtesy of University of Minnesota | |10b | |

Part 2: Answer the following questions as they relate to the nine phyla in the assignment table. (Porifera, Cnidaria, Nematoda, Athropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata.) 1. Which phyla lack organs? What type of symmetry do they have? Porifera lacks organs. It lacks symmetry and so it is asymmetrical. Cnidaria also lack organs and has radial symmetry. 2. List all of the phyla that show cephalization. The phyla are: Platyhelminthes, Nematoda, Chordata, Arthropoda, Molusca, Annelida.

3. Do all organisms on the table have 3 germ layers (endoderm, ectoderm, and mesoderm)? If not, which phyla have fewer than three germ layers? Not all organisms on the table have 3 germ layers. Those which have less than 3 germ layers are Cnidaria which has two germ layers.

4. One phylum on the table has more species than all the others. State the name of this phylum, and provide several different examples of species found in this phylum. Phylum Arthropoda has many species than any other phylum. They include insects, arachnids and crustaceans.

5. Fish do not all have the same skeletal structure. Describe the differences among fish from the most primitive to more advanced types of fish. There are cartilaginous fish, jawless fish and bony fish. In the jawless fish we have the notochord instead of a backbone. The bony fish have no notochord but have a vertebra fused together and is hard. In the cartilaginous fish we have the presence of a notochord with a cartilaginous vertebrae surrounding it (George, 2010).

6. Describe the three types of mammals based on how their young develop. There are three types of mammals based on how their young ones develops. We have placental mammals, marsupials and monotremes. Placentals: The embryos develop in the womb of their mother. They are born when they are completely developed. Examples include: Human beings and cows. Monotremes: They are egg laying mammals and their young ones hatch from eggs they lay. An example is the duck-billed platypus. Marsupials: The development of their young ones happens outside the body of the mother since . This usually happens in the pouch of the mother. An example is the kangaroo (Smith, 2009).

References George O. (2010). Classification of Fish: The Structure of the Skeleton. Lighthouse publication, Cairo, p54-56. Smith K. (2009). Organisms Classification: Phyla in kingdom Animalia. A journal of Classification of species in Kingdom Animalia. 23345-333 p3-4.