Lecture 7
1. Compare holoselachi and neoselachii. 2. What is a major benefit of having a cartilaginous skeleton? 3. Compare the lipid-filled liver of Chondrichthyans with the gas-filled swim bladder of other bony fish. 4. Explain the diagram. What structure is being tested? What conclusion can be drawn from this? *be able to label the diagram as well
(A)
D
Live fle
5. Chondrichthyans detect prey using
that come from the
6. Explain shark teeth shapes and their functions 7. What are claspers?
Lecture 8
1. Compare endochondral bone and dermal bone. 2. What is a gas-filled bladder? How does it differ from the swim bladder? 3. What are fin rays? *understand the differences in derived/ancestral actinopterygian/sarcopterygian fins 4. Label these forms of fin rays.
5. What's the difference between Heterocercal Caudal fins and Homocercal caudal fins? 6. What are pharyngeal jaws?