Chondroichthyes

1. Explain distinguishing characteristics of Chordata and Vertebrata
    and give their significance.

2. Describe appearance of hagfishes and relate their appearance to their
    feeding behaviors.

3. Account for hagfishes’ production of slime.

4. Distinguish between hagfishes and lampreys.

5. Describe some distinguishing characteristics of Chondrichthyes.

6. Distinguish between skates and rays. Describe how skates and rays swim.

7. Describe local species of skates and rays.

8. Explain how skates and rays affect benthic ecosystems.

9. Describe general appearance and life history of sharks.

10. Explain the concept "negatively bouyant".

11. Describe how sharks swim compared to rays and skates.

12. Explain the differences between ovoviviparous, oviparous, and viviparous. Give an
      example of each.

13. Compare sense organs of chondrichthyes with mammalia. Explain
       how their sense organs reflect the differences in their lifestyle.

14. Describe how sharks locate their food.

15. Describe some species of sharks and compare their morphology
      with their habitat.

16. Describe "values" of sharks, in addition to food source.

MiniTaxonomy

Phylum Chordata
   Subphylum Vertebrata
      Class Agnatha-jawless fishes
      Class Chondrichthyes-cartilaginous fishes
         Subclass Holocephali  chimaeras (ratfishes)
         Subclass Elasmobranchii Sharks, skates, rays, sawfish
            Superorder Batoidea  Skates, rays, sawfish
            Superorder Selachians  Sharks
      Class Osteichthyes-bony fishes
      Class Amphibia-tetrapods lay eggs without amnion or shell
      Class Reptilia-tetrapods w amniotic eggs and scaly skin
      Class Aves-birds
      Class Mammalia-tetrapods w mammary glands, high body temp.

Vocabulary

barbel(s)
dioecious
elasmobranch
batoid
spiracle
placoid scales
ovoviviparous
oviparous
viviparous
negatively bouyant
olfactory
macula
tapetum
Ampullae of lorenzini
shagreen

Chap 7 pp 142-148,153-154,156-157, 162-166 & class notes not from book