Back to quiz

6. was the mouth on the upper side or the lower side of the echinoid

  • lower side
  • upper side

7. what is the entire echinoid skeleton called?

  • plastron
  • test
  • echinoidea
  • apical system

8. what is the centre of the aboral surface called?

  • the apical system
  • the water vasular system
  • the perignathic girdle

9. where did the tube foot protrude from in a regular echinoid?

  • periproct
  • pore pairs
  • madreporite
  • tubercle

10. what does the water vascular system do?

  • help to extend the echinoids tube feet
  • the main source of respiration for the animal
  • how the animal breathes - like gills on a fish

11. were echinoids able to move?

  • yes
  • no
  • only regular
  • only irregular

12. where were the sperm and eggs released on an echinoid

  • genital plate
  • pubic bone
  • madreporite
  • aristoles lantern

13. what feature of the irregular echinoid prevented sediment moving into the mouth

  • peristome
  • labrum
  • periproct
  • plastron

14. what type of symmetry do all echinoids show?

  • five-fold symmetry
  • bilateral symmetry
  • radial symmetry

15. which plates were where the tubercles were located? for regular echinoids

  • interambulacral plates
  • ambulacral plats

16. what was the name of the plate where the pore pairs are located on an irregular echinoid?

  • petaloid ambulacral plate
  • interambulacral plate
  • ambulacral plate

17. do regular echinoids live in high energy or low energy environments?

  • high energy
  • low energy

18. what is the echinoid phylum?

  • cephlapoda
  • cnidaria
  • echinodermata
  • mollusca

19. what are the jaws on a regular echinoid called?

  • aristoles lantern
  • periproct
  • plastron
  • labrum

20. how does the regular echinoid feed?

  • are filter feeders
  • uses jaws to graze
  • uses cilia to generate currents