Question

Which of the following are characteristics of primates? Check all of the boxes that apply.

eyes in front part of skull

large brain relative to body size

large nose or snout

various teeth shapes and sizes

claws instead of nails

immobile thumbs

Answer 1

[✓] eyes in front part of skull — forward-facing eyes for stereoscopic vision
[✓] large brain relative to body size — primates show relatively large brains
[✓] various teeth shapes and sizes — generalized/heterodont dentition is typical

[ ] large nose or snout — primates generally have reduced snouts (except some strepsirrhines)
[ ] claws instead of nails — most primates have nails (a few species have a grooming claw)
[ ] immobile thumbs — primates have mobile/opposable thumbs (or big toes) for grasping