Zoology Unit 6 Review
Define:
chondr
icthyes
fusi
gnat
os or osteo
Prechordates and Chordates
1. Acorn worms belong to which phylum?
2. What does “hemi” mean?
3. Why are acorn worms in this phylum?
Phylum: Chordata
4. What 4 characteristics must animals possess sometime during their lives in order to be
classified as chordates?
5. Which invertebrate-like chordate is included in the subphylum Urochordata? Describe the
larval and adult stages.
6. Which invertebrate-like chordate is included in the subphylum Cephalochordata? Which
chordate characteristic does it lack?
Subphylum: Vertebrata
7. What are 5 characteristics of vertebrates?
8. What protects the dorsal nerve?
9. Describe the axial skeleton.
10. Describe the appendicular skeleton.
11. Describe characteristics/give examples of the class Agnatha.
12. Describe characteristics/give examples of the class Chondrichthyes.
13. Describe characteristics/give examples of the class Osteichtyes.
Class: Chondrichthyes
14. What body type do sharks have?
15. What is the function of the olfactory sacs?
16. Draw a placoid scale that covers the body of Chondrichthyes.
17. What types of skeleton do sharks have and what is it made of?
18. What type of heart do sharks/rays have?
19. What type of tail do members of this class have?
20. Do sharks/ rays have a swim bladder?
21. How do they stay afloat?
22. What system do fish have that other vertebrates lack? What does this system detect?
Class: Osteichthyes
23. Describe the skeleton.
24. How is the tail shaped?
25. What type of scales do bony fish have?
26. What is the function of the operculum?
28. Describe how a fish’s swim bladder works.
27. How many chambers does a fish’s heart have?
31. What is the cloaca?
32. Differentiate between oviparous, ovoviviparous, and viviparous.
Label the fin diagram-