Why do we have wisdom teeth?
Show answer & explanation
Answer: Evolutionary leftover from diet
Mark of reaching adulthood — Wrong. Wisdom teeth aren't markers of adulthood. They're evolutionary remnants that typically erupt in late teens/early twenties when jaw growth is complete.
Backup teeth in case of loss — Wrong. While extra teeth seem like backups, wisdom teeth are actually evolutionary leftovers that often don't fit properly in modern jaws.
Evolutionary leftover from diet ✓ — Correct! Wisdom teeth are third molars that were useful to our ancestors who ate coarse, tough foods like roots, nuts, and raw meat. As human diets changed and jaws became smaller through evolution, these teeth often don't fit properly and may need removal.
More Evolution & Genetics questions
- Which of the following best describes a common change in RNA transcript length with age?
- Why do different organs in mammals show different gene activity patterns related to longevity?
- What can researchers learn about people of the same age from separate RNA-based aging clocks that estimate age from inflammation-related and metabolism-related gene activity?
- If you sort the many gene-activity changes that come with age into groups that rise and fall together, what does that grouping reveal?
- Why might aging mouse, monkey, and human cells show similar changes in the RNA they produce across different tissues?
- Why does a platypus still count as a mammal when it lays eggs and has no nipples?