Gastropods (snails and slugs)
Question 1 - 10
Write ONE WORD AND/OR A NUMBER for each answer.
GASTROPODS (SNAILS AND SLUGS)
Evolution
- Minerals in the bodies of gastropods are like those in the .
- Fossils date back 500 million years.
Physical features
- Single, muscular foot.
- Radula (used for feeding).
- Shell (snails only).
- Size: British shells range from 1.5-50 mm.
- Form: most shells coil to the .
- Some shells have ribs, spines or .
- They have various colours and patterns.
Feeding habits
- Mainly feed on rotting plants, fungi or algae.
- Some eat live animals, e.g. shield slugs eat .
Predators
- Birds, frogs, flies
- Humans - snails were probably introduced to Britain as food in the .
- Many gastropods have particular types of itself slippery …, e.g. glutinous snail makes.
Habitats
- Gastropods prefer dampness and shade.
- conditions are worst.
- Biggest variety is found in old, natural habitats, e.g. and meadowland.
- Highly specialized species live in unusual habitats, e.g. blind snail lives entirely below the .
- Good indicators of the quality of the .
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