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2. What is the purpose of the interambulacrum, on a regular echinoid?

  • For directing waste away from the mouth
  • For respiration
  • The location of the tubercles, for spines
  • For feeding

3. What is the purpose of a lophophore, on a brachiopod?

  • Used to attach to rocks
  • Used for respiration
  • Used to filter feed
  • Used to open the valves

4. What is needed for coral growth?

  • Deep water
  • Clear Water
  • Temperature between 20oC and 25oC
  • Low energy environment

5. What phylum do trilobites belong in?

  • Cnidaria
  • Arthropoda
  • Mollusca
  • Chordata
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