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How to Identify and Classify Snails - Quiz
Contributed by: Wallis
  • 1. What is the primary characteristic used to initially classify a snail?
A) Diet
B) Foot color
C) Antennae length
D) Shell presence and type
  • 2. A snail with a single, spiraled shell is likely a...
A) Bivalve
B) Cephalopod
C) Gastropod
D) Polychaete
  • 3. What does 'dextral' refer to in snail shells?
A) The shell's texture
B) A shell with no spiral
C) A left-handed spiral
D) A right-handed spiral
  • 4. The opening of a snail shell is called the...
A) Aperture
B) Apex
C) Suture
D) Whorl
  • 5. What is the operculum?
A) A sensory organ
B) A layer of shell growth
C) A 'door' that closes the aperture
D) The snail's mouth
  • 6. Snail shells are primarily composed of...
A) Protein
B) Calcium carbonate
C) Chitin
D) Silica
  • 7. The pointed top of the shell is called the...
A) Columella
B) Base
C) Lip
D) Apex
  • 8. What is a keel on a snail shell?
A) A growth line
B) A smooth surface
C) A sharp ridge
D) A deep groove
  • 9. What type of environment do terrestrial snails inhabit?
A) Brackish water
B) Land
C) Freshwater
D) Saltwater
  • 10. What is a key difference between marine and freshwater snails?
A) Salinity tolerance
B) Diet
C) Shell shape
D) Size
  • 11. How do you identify a snail at the family level?
A) Analyzing shell and soft body features
B) Only size
C) Only shell color
D) By its location
  • 12. What are the spiral lines on a snail shell's surface called?
A) Varices
B) Axial ribs
C) Growth rings
D) Spiral cords
  • 13. What is the umbilicus of a snail shell?
A) The shell's texture
B) A hole at the shell's base
C) The shell's inner layer
D) The shell's outer lip
  • 14. What feature is important when classifying snails based on their habitat?
A) Adaptations to water availability
B) Shell size
C) Foot size
D) Shell color
  • 15. How is the size of a snail shell typically measured?
A) Length and width
B) Only width
C) By weight
D) Only length
  • 16. What does 'sinistral' refer to in snail shells?
A) The shell's color
B) A shell with no spiral
C) A right-handed spiral
D) A left-handed spiral
  • 17. The whorls of the snail shell are separated by...
A) Columella
B) Sutures
C) Apex
D) Aperture
  • 18. What is the columella of a snail shell?
A) The apex
B) The central axis
C) The outer lip
D) A sensory organ
  • 19. What is a varix on a snail shell?
A) A sharp spine
B) A spiral groove
C) A smooth area
D) A raised, thickened growth line
  • 20. What is a common food source for terrestrial snails?
A) Insects
B) Vegetation
C) Algae
D) Small fish
  • 21. Which snail is most likely to be found in a deep ocean trench?
A) A tree snail
B) A pond snail
C) A garden snail
D) A deep-sea snail
  • 22. What is the function of the snail's foot?
A) Respiration
B) Digestion
C) Locomotion
D) Shell creation
  • 23. Why is shell ornamentation important for snail identification?
A) It indicates age
B) It affects taste
C) Distinct patterns can define species
D) It determines size
  • 24. Which feature helps snails adhere to surfaces?
A) Strong muscles
B) Mucus secretion
C) Suction cups
D) Sharp claws
  • 25. What is the mantle of a snail?
A) The respiratory organ
B) The muscular foot
C) Tissue that secretes the shell
D) The snail's brain
  • 26. What is the radula of a snail?
A) A rasping tongue-like organ
B) An internal gill
C) A reproductive organ
D) A sensory tentacle
  • 27. What type of diet is common for marine snails?
A) Only detritivorous
B) Exclusively herbivorous
C) Exclusively carnivorous
D) Herbivorous, carnivorous, or detritivorous
  • 28. What feature distinguishes a pulmonate snail?
A) Absence of a shell
B) External gills
C) A very long foot
D) A lung-like cavity for breathing
  • 29. What role do snails play in the ecosystem?
A) Producers of oxygen
B) Decomposers and food source
C) Pollinators
D) Top predators
  • 30. How does pollution affect snail populations?
A) Shell damage and reduced reproduction
B) Enhanced resistance to disease
C) Increased shell growth
D) Attracts them to contaminated areas
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