Multiple choice

Tympanic bone forms large bulla in _______.

  1. humans

  2. australopethicus

  3. Both 1 and 2

  4. lemur

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

The tympanic bulla (a bony enclosure of the middle ear) is notably large in lemurs and other prosimians compared to humans and australopithecines. This is an anatomical feature used in primate classification and comparative anatomy.