The radula is best described as which anatomical feature?

The radula is best described as which anatomical feature?

• A. A tongue with tiny teeth
• B. A beak
• C. A gill
• D. A foot

Answer: (A)

The main idea is understanding the feeding apparatus of many mollusks. The radula is a tongue-like structure inside the mouth that carries many tiny teeth on a flexible ribbon. When the animal feeds, the radula is extended and moved across surfaces to rasp, scrape, or slice its food—think of it as a miniature rasping tongue. This description fits best because it emphasizes its position in the mouth and its toothed surface used for processing food. It’s not a beak (which is a hard mouthpart used for biting or tearing in some cephalopods), not a gill (the organ for gas exchange), and not a foot (the muscular structure used for movement). The radula’s distinctive function and structure align with a tongue with tiny teeth.

The main idea is understanding the feeding apparatus of many mollusks. The radula is a tongue-like structure inside the mouth that carries many tiny teeth on a flexible ribbon. When the animal feeds, the radula is extended and moved across surfaces to rasp, scrape, or slice its food—think of it as a miniature rasping tongue. This description fits best because it emphasizes its position in the mouth and its toothed surface used for processing food. It’s not a beak (which is a hard mouthpart used for biting or tearing in some cephalopods), not a gill (the organ for gas exchange), and not a foot (the muscular structure used for movement). The radula’s distinctive function and structure align with a tongue with tiny teeth.