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