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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
10. Which one retains its outer shell?
- Nautilus
- Octopus
- Squid
- Cuttlefish
11. The mantle excretes what?
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