Human evolution

Question 1

primates

Answer 1

-dexterous hands and feet with 5 digits that can grasp
-An opposable thumb (in some cases)
-stereoscopic 3D vision
-small number of offspring with relatively long gestational period
-relatively large brains
-flattened nails on digits that are sensitive to touch

Question 2

Hominoids

Answer 2

-No tail (unlike monkeys)
-Molars have 5 cusps (monkeys have 4 cusps)
-Rib cage is flattened
Locomotion by brachiation (swinging), knuckle walking or bipedalism
-Posture is partially or fully erect, allowing hands to use tools, manipulate food or care for young

Question 3

Hominins

Answer 3

-Very fine hair
-Locomotion is bipedal
-Position of foramen magnum (hole) is centered under the skull
-Larger brain compared to apes, with well developed cerebral cortex
-Smaller jaws and teeth
-Shorter, broader pelvis