| A | B |
|---|
| arboreal | adapted for tree living |
| prehensile | ability to grasp |
| quadrupedalism | move on four legs |
| bipedalism | move on two legs |
| binocular | two eyes overlapping field of view |
| stereoscopic | brain able to use information from two eyes |
| tapetum | reflecting layer at the back of the retina |
| rhinarium | moist nose |
| diastema | space in teeth for overlapping canines |
| brachiating | hanging and swinging through trees |
| knucklewalking | locomotion, leaning on back of hands |
| nocturnal | active at night |
| vocalisation | communication by sound |
| scent glands | communication by smell |
| ischial callosities | insensitive pads of skin on rump of baboons |
| opposable | thumb able to move across palm |
| supination | hand able to twist at fore arm |
| sexual dimorphism | difference between male and female adults |
| plantegrade | walking on flat of foot |
| Y5 | pattern on cusp of ape teeth |
