Human origin 1 Flashcards
1
Q
When was the primate ancestor first established?
A
80 million years ago
2
Q
What are the two groups in primates?
A
- Prosimians
- Simians
3
Q
Prosimian features
A
- Grasping fingers and toes
- Binocular vision
- Mostly nocturnal and arboral
- Include lemurs
4
Q
Simian features
A
- Originated in africa and asia
- Spilt into “New-World” or “Old-World”
- Overlapping fields of vision
- Opposable thumbs
- Diurnal
5
Q
Simularity between chimps and humans
A
- 95% simularity in genome
- Differences are only 10x greater than differences between two unrelated people
6
Q
Apes
A
- Large brain
- Flexible behavior
- Tail-less
- Social complexity
7
Q
Aurdipithicus ramidus
A
- 4.4 MYA
- Chimp sized brain
- Broader diet than chimps
- Partly bipedal
8
Q
“Lucy”
A
- 1973 discovery
- 3.2 MYA
- Human like teeth
- Ape-like head
9
Q
Austrolpithicus
A
- 2 MYA
- Round jaw
- 35% brain size to humans
- Stocky build
- Large teeth and jaws
- Various ways of moving
10
Q
Homo hablis
A
- 2.5 MYA
- Uses stone tools
- Short
- Long arms
- 50% brain size to humans
- Short jaw
11
Q
Homo erectus
A
- 2 MYA
- 5 Foot
- Long straight legs
- Thick skull
- Large brain
- Rounded jaw
- Speach may be possible
12
Q
Neanderthal
A
- 600,000 YA
- 12.4cm shorter than humans
- Large brains
- Diverse tool use
- Lived in huts and caves
- Social
- Buried dead
13
Q
Cro-magnen man
A
- Link between modern humans and Neanderthals
- Replaced Neanderthals 300,000 years ago
- Sophisticated tools
- Complex social
- Facial expressions
- Language
- Loss of body hair
- Long thumb
- Colonised plains
