I do not undertsand this biology question...?

Question

Animals 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.

The common categories are Domain, Kingdom, Phylum, Class, Order, Family, Genus and Species (Specific Epithet.

The images are examples of nine Animal Phylum: Porifera, Cnidaria, Nematoda, Arthropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata.

1. Which group(s) lack tissue level organization?

2. Which group(s) of organism(s) begins to show cephalization?

3. Do all organisms on the chart have 3 germ layers (endoderm, ectoderm and mesoderf not which groups lack all three?

4. One group has more species than all the other groups, give the name of the Phylum and examples of species found in this group.

5. Do all fish have the same skeletal structures? If not, describe the differences.

6. Describe the 3 different types of mammel

Answer 1

1. Phylum Porifera

2. Arthropoda, Platyhelminthes, Annelida, Nematoda, Chordata

3. No, Porifera don't have tissues, and Cnidaria only have 2

4. Arthropoda- Insects

5. No, Chondrichthyan which are the sharks and rays skeletal structure made of  cartilage Ray finned- tuna, clownfish, seahorses. Made with strong flexible rays used for manuevering, defense and othe functions. Also have an operculum Lobe-fins have rod-shaped bones surrounded by thick layer of muscle.

6. Marsupials, Eutherians, and Monotremes

Answer 2

You should contact your professor to go over this project with you. I am pretty sure posting a question like this from your class is a violation of Intellectual Property laws.