Multiple choice

The excreta of lizards and birds contains a white component which is chemically ______.

  1. Urea

  2. Uric acid

  3. Creatinine

  4. Precipitated calcium

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

Birds and lizards are uricotelic, meaning they excrete nitrogenous waste primarily in the form of uric acid. This is a water-conserving adaptation, as uric acid is relatively insoluble and excreted as a white paste.