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6. Who has a labrum?
- Regular Echinoid
- Irregular Echinoid
- Both
7. Who has tubercles?
- Both
- Regular Echinoids
- Irregular Echinoids
8. Who shows Bilateral Symmetry?
- Regular Echinoid
- Irregular Echinoid
- Both
9. Who particle feeds?
- Both
- Irregular Echinoid
- Regular Echinoid
10. Who lives in high energy conditions?
- Regular Echinoid
- Both
- Irregular Echinoid
11. Who has fascioles to direct water to the mouth and to direct waste away from the echinoid?
- Irregular Echinoid
- Regular Echinoid
- Both
12. Who has 5-fold radial symmetry?
- Regular Echinoid
- Both
- Irregular Echinoid
13. Who uses the tube feet for, respiration, attachment and movement?
- Regular Echinoid
- Irregular Echinoid
- Both
14. Who has an 'Aristotle's lantern'?
- Regular Echinoid
- Irregular Echinoid
- Both