The radula in mollusks is primarily used for what function?

• A. Feeding by scraping food
• B. Breathing
• C. Locomotion
• D. Reproduction

Answer: (A)

The radula is a specialized feeding organ. It’s a flexible ribbon lined with many tiny teeth that move to rasp and scrape food off surfaces, guiding the material into the mouth and then the digestive tract. This scraping action is exactly how many mollusks, like snails and chitons, acquire their food—algae, biofilm, or detritus—before digestion. It’s not used for breathing, which relies on gills or mantle cavity; nor for movement, which depends on the muscular foot in many species; nor for reproduction, which involves reproductive organs and processes. In some predatory mollusks, the radula can be further modified for capturing prey, but its main role across mollusks is feeding by scraping.