1. Invertebrate Review
AP Biology

2. What is the germ layer in embryological development that will form the skin and nervous system?
ECTODERM

3. What is the name of the organism whose gut development follows this pattern?
PROTOSTOME

4. What is the name of a fluid-filled body cavity that characterizes animals?
COELOM

5. How would we characterize this organism in terms of body cavity?
ACOELOMATE

6. Which of the following characteristics is NOT present in all animal phyla?
multicellularity
organ systems
heterotrophy
diploidy
sexual reproduction

7. What is the term for the development of nervous tissue and sensory organs towards a localized “head” region?
CEPHALIZATION

8. How do poriferans (sponges) feed?
FILTER FEEDING

9. What is the name of the structure in sponges that provides skeletal support and is made of silica or calcium carbonate?
SPICULE

10. What is this structure, which allows water to pass through the sponge?
PORE

11. Which phylum is characterized by radial symmetry and two germ layers?
CNIDARIA

12. What are the names of the two body forms a cnidarian may take?
MEDUSA & POLYP

13. What is this structure? (which can really sting if you trigger it!)
NEMATOCYST

14. Which phylum is better known as the flatworms?
PLATYHELMINTHES

15. Tissues derived from mesoderm are absent in
sponges.
cnidarians.
flatworms.
sponges and cnidarians.
sponges, cnidarians, and flatworms.

16. Which of the following is mismatched?
cnidarians; nematocysts
sponges; spicules
flatworms; bilateral symmetry
annelids; segmented body
echinoderms; protostomes

17. Which phylum contains a mantle?
MOLLUSCA

18. What structure in mollusks is responsible for feeding?
RADULA

19. Within phylum Mollusca, under what class does this organism fall?
CEPHALOPODA

20. NEMATODA What phylum does this describe?
Flexible cuticle, longitudinal muscles, a complete digestive system, and a false coelom.
NEMATODA

21. Which phylum is characterized by being the first to have segmentation?
ANNELIDA

22. What is the name of the structure in arthropods that provides physical support, protection, must be shed, prevents drying out, and is an anchoring site for muscles?
EXOSKELETON

23. A water vascular system is characteristic of which phylum?
ECHINODERMATA

24. All EXCEPT which of these is an echinoderm?
sea anemone
sea lily
sea urchin
brittle star
sand dollar