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6. Gastropods include

  • Octopuses, squid, cuttlefish and nautiluses
  • Snails and slugs
  • Clams, oysters and mussels

7. Cephalopods use a siphon to

  • Control water flow in the mantle cavity
  • Feed
  • Burrow

8. The heart, digestive excretory and reproductive organs are concentrated in a centralised internal...

  • Visceral mass
  • Nerve net
  • Mantle

9. Many molluscs use their gills as filter feeding devices

  • True
  • False

10. Which one retains its outer shell?

  • Nautilus
  • Octopus
  • Squid
  • Cuttlefish

11. The mantle excretes what?

  • The shell
  • Mucus

12. Many bivalves use their foot for

  • Catching prey
  • Burrowing
  • Filter feeding

13. Which of the following do Molluscs not all share?

  • A visceral mass
  • Siphons
  • A foot
  • A mantle

14. What does the mantle cover?

  • The organs
  • The visceral mass
  • The foot