Lecture 16 Flashcards
1
Q
Social Systems: Gibbons
A
monogamous
2
Q
Social Systems: Orangutans
A
- solitary
- bimaturation
- occasional forced copulation
3
Q
Social Systems: Gorillas
A
- harems, usually one silverback with many females with offspring
- infanticide
4
Q
Social Systems: Chimps
A
- multi-male, multi-female groups
- male dominated hierarchy
- raids
5
Q
Social Systems: Bonobos
A
- female-dominated hierarchy
- strong female-female bonds
- lots of sex
6
Q
Suspensory Locomotion
A
climbing underneath branches rather than on top
7
Q
Bipedalism
A
-walking on two feet
8
Q
Theories of bipedalism
A
- keeps hominins cooler, less sun on their back
- frees up the arms to collect food and such
- response to increased dependance of offspring
9
Q
Differences between humans and apes
A
- fully bipedal
- dental characteristics
- long juvenile period
- large brains relative to body size
- spoken language, symbolic culture
10
Q
Ancestral Features of Hominins
A
- small molars
- thin enamel
- canines larger than humans
- large brow ridge
- small braincase relative to other humans
11
Q
Derived Features of Hominins
A
- relatively small canine teeth compared to chimps
- changes in femur and pelvis
- flattening of face compared to chimps
