Multiple choice

Which of the following traits is not a characteristic of birds?

  1. Hollow bones

  2. Ectothermic

  3. Amniote egg

  4. Air sacs attached to lungs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Birds are not ectothermic. Animals, such as reptiles, fish or amphibians use environmental energy and behavioral adaptations to regulate their body temperature and are ectothermic. Birds and mammals are endothermic.

Keep practicing — related questions