human evolution Flashcards

1
Q

evidence of humans in the late quaternary

A
  • Liang Bua limestone cave remains of 9 people

- the hobbit dated 12,000 y/a

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2
Q

what was the palaeolithic?

A
  • old stone age
  • defined by use of stone tools
  • lower palaeolithic = pre H.sapiens, H. Habilis onwards
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3
Q

middle palaeolithic

A

H. sapiens

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4
Q

where was the earliest evidence of humans found?

A
  • N of Alps
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5
Q

evidence of first Britons

A
  • 780,000-990,000 y/a

- Goughs cave, Somerset

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6
Q

how was the evidence of the first Britons dated?

A

using known magnetic reversals and law of super-position with other interglacial deposits

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7
Q

when was the mesolithic?

A

10,500-6000 y/a

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8
Q

advances in the mesolithic

A
  • stone industry
  • microlithic flaked tools and blades
  • preserved artefacts
  • wide diet, seasonal
  • marine and terrestrial animal consumption
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9
Q

when was the neolithic period?

A

6000 y/a

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10
Q

what was the neolithic revolution?

A
  • domestication of plants
  • animal breeding
  • pop increase
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11
Q

what did the occupation of Britain depend on?

A

ebb and flow with glacial-interglacial cycle

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12
Q

when we’re H.neanderthalenisis remains found?

A

1856

Germany

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13
Q

when was ‘On the Origins of Species by Means of Natural Selection’ published?

A

1859

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14
Q

who and when were H.erectus discovered?

A

Eugene Dubois 1891

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15
Q

Animalia

A
  • kingdom

- animals can move on their own

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16
Q

Chordata

A
  • phylum

- animals have a backbone

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17
Q

Mammalia

A
  • class

- chordates with fur and milk glands

18
Q

primate

A
  • order

- mammals with collar bones and grasping fingers

19
Q

Hominidae

A
  • family

- primates with relatively flat faces and 3D vision

20
Q

Homo

A
  • genus

- hominids with upright posture and large brains

21
Q

sapiens

A
  • species

- Homo with high forehead and thin skull bones

22
Q

what does Hominid mean?

A

the Great Apes

23
Q

what does Hominin mean?

A

all members of the Homo genus and ancestors

24
Q

australopithecina

A

203 Ma

25
Q

what are Sahelthropus tchadensis?

A
  • chimp/ human features
  • brain size comparable to a chimp
  • may have walked upright
26
Q

Australopithecus anamensis

A
  • may have walked upright

- teeth adapted to eating tough food

27
Q

Australopithecus afarensis

A
  • walked upright
  • 1.2-1.4m tall
  • brain 35% of H. sapiens
  • no stone tools
28
Q

Homo habilis

A
  • first in Homo genus
  • brain 50% size of H. sapiens
  • primitive stone tools
29
Q

Homo ergaster

A
  • small face and teeth
  • brain 60% of H.sapiens
  • advanced stone tools and handles
  • first use of fire?
30
Q

Homo erectus

A
  • anatomy similar to H.sapiens
  • brain 60-70%
  • successful c. 2 mil years
  • first species out of Africa
  • coexisted with H.sapiens
31
Q

Homo heidelbergensis

A
  • brain 85%
  • used tools
  • european ones developed neanderthal like features
  • African ones evolved into H.sapiens
32
Q

Homo neanderthalensis

A
  • stocky and cold-adapted
  • used advanced stone tools
  • social structure and rudimentary
  • slightly larger brain than H.sapiens
  • dominated Europe
33
Q

Homo sapiens

A
  • cultural ability
  • complex tools
  • proficiency in practical and social innovation
  • 125,000 y/a, first H. sapiens out of Africa
34
Q

where did H.sapiens go after Africa?

A
  • Middle East
  • S Asia
  • Australia
35
Q

where did they go after Aus?

A
  • europe
  • N asia
  • Indonesia
36
Q

how many years did H.sapiens and H. erectus coexist for?

A

2600-5400 years

37
Q

problems H. sapiens and H. erectus faced

A
  • conflict
  • comp
  • interbreeding (copulation)
  • climate
38
Q

copulation

A

inter-breeding is possible between both species and DNA supports this
eg. modern non-Africans possess ~1-3% Neanderthal DNA
20% neanderthal DNA still represented in anatomically modern humans

39
Q

where was the centre of human evolution?

A

E Africa- 10-12 Ma

40
Q

how has climate affected evolution?

A
  • southerly migration of ITCZ over Africa which was cooler but drier
41
Q

how has the environment affected evolution?

A
  • tectonics have transformed the region- flat, homogenous to varied heterogenous deserts to cloud forests
  • rifting = lake formation
  • freshwater fluxes
  • ice sheet surges in N Atlantic