Multiple choice

Tympanic bone forms large bulla in the

  1. humun

  2. austrapiethicus

  3. Both (1) and (2)

  4. lemur

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

The tympanic bone forms a large auditory bulla (bony enclosure) in lemurs and many other mammals. In humans and other primates, the tympanic bone is part of the temporal bone but doesn't form such a prominent bulla. Option A has a typo (humun should be human).