14. What are the classes into
which the phylum
Echinodermata is divided?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
The five echinoderm are:
asteroids (starfishes), ,
crinoids, holothuroids (sea )
and echinoids (sea and sand
dollars).