Taxonomic Categories There Are 9 Research Paper

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Kingdom: Animalia

Phylum: Nematoda

Part 2: Answer the following questions as they relate to the nine phyla in the assignment table. (Porifera, Cnidaria, Nematoda, Arthropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata.)

1. Which phyla lack organs? What type of symmetry do they have?

Porifera and Cnidaria lack organs. Porifera lack any symmetry hence these are asymmetrical while Cnidaria have radial Symmetry.

2. List all of the phyla that show cephalization.

The phyla that show cephalization are Mollusca, Annelida, Chordata, Platyhelminthes and nematoda.

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?

No, not all these organisms have 3 germ layers. Porifera has no germ layer and Cnidaria has two of them.

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.

Maximum number of species is found in Arthropoda. Some species are crustacean, insects and arachnids. For instance butterflies, spiders, beetle, grasshopper, crabs etc.

5. Fish do not all have the same skeletal structure.

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Describe the differences among fish from the most primitive to more advanced types of fish.

The fish differ on the basis of their classes namely Agnatha, Chondrichthyes and Osteichthyes. The most primitive fish is Agnatha that is jawless fish and has no skeleton. An example is lamprey. Comparatively more advanced fishes are Chondrichthyes that have cartilage in skeleton. Even their jaw is made up of cartilage. An example is ray fish. Osteichthyes is most advanced fish having bony skeleton. These type of fish move with speed and the examples include salmon and trout.

6. Describe the three types of mammals based on how their young develop.

The young ones of mammals grow differently. The mammals can be monotremes or marsupials or placental. The monotremes give milk as well as lay eggs. Bat is an example. The marsupials develop their young ones inside mother's body and grow in a pouch for example kangaroo. The placental mammals have young ones attached to the mother's placenta. An….....

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