Animal Planet IV Ch 21

Question 1

Which of the following are characteristics not found in the phylum Echonodermata?

1. Pentamerous radial symmetry.
2. Water vascular system.
3. Complete digestive system.
4. Some members can eviscerate.
5. Members all have a body wall containing an endoskeleton of calcareous ossicles with surface spines.

Answer 1

5.

Question 2

Which of the following are found in the class Chondrichthyes?
1. Gills covered with operculum
2. 5-7 gill slits.
3. Placoid scales
4. Both 2 and 3
5. Both 1 and 3

Answer 2

4.

Question 3

Answer 3

1. Mouth 9. Peduncle
2. Nares 10. Anal fin
3. Eye 11. Vent
4. Operculum 12. Pelvic fin
5. Lateral line 13. Pectoral fin
6. Dorsal fin 14. Branchiostegal rays
7. Adipose fin 15. Anterior
8. Caudal fin 16. Posterior