Multiple choice

Incisors and other teeth continue to grow throughout the life in

  1. cows and horses

  2. horses and elephants

  3. elephants and rats

  4. rats and dogs

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Elephants and rats both have continuously growing incisors (hypselodont teeth) that grow throughout their lives. This adaptation compensates for heavy wear from their feeding habits - elephants grind tough vegetation, while rats gnaw continuously. Horses have continuously growing teeth as well, but cows do not exhibit this pattern to the same extent.

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