Sharks have multiple rows of teeth because they can replace them easily. Think of it like having a drawer full of spoons, if one gets broken, you just pick another one from the drawer. Sharks keep a whole row of spare teeth behind their front ones, so when they lose a tooth, a new one moves forward automatically.
Examples
- A shark loses a front tooth while biting into a fish, another one moves forward instantly.
- Imagine having a whole set of spoons in your drawer: when you break one, you just use another one from behind.
- Sharks can eat sand and rocks without their teeth getting ruined because they replace them as needed.
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See also
- How come large herbivores have such thin legs?
- Are humans more adapted to "light mode" or "dark mode"?
- How many times did terrestrial life emerge from the ocean?
- What are fitness trade-offs?
- What are environmental pressures?