Phylum Porifera
1. What is the common name of organisms in this Phylum?
2. Why do you think this group was named Porifera?
3. What habitats are these organisms found in? (i.e. marine, freshwater, terrestrial?)
4. How do organisms in this phylum differ from other animals with respect to symmetry and tissue development?
5. Describe the basic body plan and feeding method of these organisms. What are choanocytes? Phylum Cnidaria
6. What types of organisms belong to this phylum? (common names)
7. Why do you think this group was named Cnidaria?
8. What habitats are these organisms found in?
9. How many embryonic germ layers do these organisms have? Describe the basic body plan that results from those layers, including the type of gut that is present (sac-like or tube-within-a-tube?).
10. Cnidarians can exist as either polyps or medusa body forms. What is the difference between these types? Which form is most common in each of the following groups: anemones, coral, hydra, jellyfish? *The remaining phyla covered on this worksheet are all classified as Bilateria and Protostomes.
11. What characteristic groups these organisms together as Bilaterians?
12. What other characteristics do protostomes share?
13. Most protostomes have coeloms (body cavities). Which phylum in this group is acoelomate? Which phyla are pseudocoelomate? How does the absence/presence of a coelom impact organ system development and body complexity