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6. Sea lilies are also known as
7. Sea stars and brittle stars are part of what major group of Echinodermata?
8. What do the arms of starfish house?
- The mouth
- The Mouth and anus
- The digestive organs
- The gonads and digestive organs
- The gonads
9. What are spines in sea urchins used for?
- Locomotion and Defence
- Locomotion
- Defence
10. What are sea urchin spines attached to?
- Substrate
- Pores
- Ball and socket joints
- Tube feet
11. Sea cucumbers have a mouth and anus at the front and back
12. Feather stalks are a type of...
- Crinoid
- Anthozoans
- Sea stars
13. Do brittle starfish have flexible arms?
14. What are brittle starfishes arms composed of?
- Non jointed, hard plates
- Non jointed, soft plates
- Jointed, hard plates
- Jointed, soft plates
15. Motile echinoderms move equally well in all directions?
16. How many major groups of Echinorderms are there?
17. Larvae Echinoderms display what kind of symmetry?
- Bilateral
- Radial
- Pentaradially
18. Which one of the following do starfish not use tube feet for?
- Filter feeding
- Locomotion
- Gas exchange
- Attachment
19. Sea urchins and sea cucumber are part of which major Echinodermata group?
20. Feather stars use their arms with feathery fringes for...
- Swimming
- Both
- Filter feeding