Assignment Type: Individual Project Deliverable Length: Completed table & answer

Question

Assignment Type: Individual Project Deliverable Length: Completed table & answer to questions
Points Possible: 125 Due Date: 7/10/2011 11:59:59 PM CT


Click here for the SCIE 206 Library Research Guide: This guide illustrates how to use the AIU Online Library to find information for SCIE 206 including web resources, encyclopedias, articles, and book databases.

Organisms are placed in taxonomic classifications based on differences and similarities of their traits. If you know what critical traits to look for, it is possible to separate any animal into a taxonomic category using a dichotomous key.

The common taxonomic categories are Domain, Kingdom, Phylum, Class, Order, Family, Genus and Species (Specific Epithet.) We are looking at the Phylum and Class categories in this assignment.

Assignment

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?
2.List all of the phyla that show cephalization.
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?
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.
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.
6.Describe the three types of mammals based on how their young develop.
Provide references in APA format. This includes a reference list and in-text citations for references used throughout the assignment.
Needs REFERENCES PLEASE

Explanation / Answer

1.poriferans ----------assymetrical

2. all phylum except protozoa , poriferians

3.poriferians and cnidaria

4.arthropoda ----------mites,spiders, centipedes, millipeds



5. bony fish ,cartilaginous fish
cartilaginous fish with notochord
bony fish without notochord

6. monotremes---------lay eggs
marsupials----------immature babies , ,,,in pouch

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