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6. Sea lilies are also known as

  • Crinoids
  • Sea cucumbers

7. Sea stars and brittle stars are part of what major group of Echinodermata?

  • Anthozoans
  • Echinozoans

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

  • True
  • False

12. Feather stalks are a type of...

  • Crinoid
  • Anthozoans
  • Sea stars

13. Do brittle starfish have flexible arms?

  • Yes
  • No

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?

  • True
  • False

16. How many major groups of Echinorderms are there?

  • 3
  • 2
  • 1
  • 4

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?

  • Echinozoans
  • Anthozoans

20. Feather stars use their arms with feathery fringes for...

  • Swimming
  • Both
  • Filter feeding