Webquest/Virtual Lab on Mollusks and Echinoderms

Name: ______Date: ______

Go to: http://animals.about.com/od/molluscs/a/mollusc-facts.htm

1. Name 2 characteristics of mollusks:

2. Squid belongs to which class of mollusks?

Squid dissection:

Go to: http://www.biologycorner.com/worksheets/squid_virtual.html#.Uxi7Hz-- 3PY

1. Translated the word ‘cephalopods’ means….?

2. Look at the picture of the arms and tentacles. How do they differ?

3. How are the tentacles and the arms the same?

4. How does the dorsal side of the squid compare to the ventral side of the squid? (Hint – you may want to scroll back up to the first picture again)

5. Why is the mouth of the squid called a ‘beak’? 6. Where is the ink sac of the squid located?

7. How does the squid breathe?

8. What does the ‘pen’ help the squid with?

Go to http://www.starfish.ch/reef/echinoderms.html

9. Name 3 characteristics of an echinoderm.

Match the animal with the class: Write the letter next to your answer.

DO NOT draw lines across.

Some of the animals will have the same class.

9. Sand dollars A. Crinoidea

10. Sea urchins B. Asteroidea

11. Starfish C. Holothuroidea

12. Sea cucumbers D. Echinoidea

13. Feather stars E. Ophiuroidea

14. Brittle stars

Read ‘Behavior of Sea stars’:

15. What is regeneration? Read ‘Behavior of Sea Urchins’:

16. Name 3 animals that can live symbiotically with sea urchins.

Scroll down to look at the pictures of the sea urchins and some of these animals.

Go to http://vsechinoderms.weebly.com/virtual-lab.html

Click on ‘Anatomy’ and then on ‘Start’. Roll over the different labels to get the information needed.

17. Where is the mouth of the sea urchin located? (Dorsal or ventral side?)

18. What do sea urchins normally eat?

19. Where is the anus of the sea urchin located? (Dorsal or ventral side?)

20. What is the function of the water vascular system?

21. What is ‘Aristotle’s lantern’?

22. How do sea urchins reproduce? (Click on ‘Gonads’)

23. What is the main function of the spines of a sea urchin?

24. What are the pedicellaria? 25. How do sea urchins move?

Click on ‘Check your knowledge’ and take the test!

Click on ‘Go back’ button and then use the back arrow to go back to the main page.

Click on ‘Predator and Prey’. Click and drag the pictures into the correct columns and complete the following table while you do so. You can roll over the pictures again after placing them in the correct column to find the names of the organisms.

Prey Neither Predator