Support for Out of Africa model mtDNA analysis from 53 humans of varied ethnic backgrounds Data...
-
date post
19-Dec-2015 -
Category
Documents
-
view
216 -
download
0
Transcript of Support for Out of Africa model mtDNA analysis from 53 humans of varied ethnic backgrounds Data...
Support for Out of Africa model mtDNA analysis from 53 humans of
varied ethnic backgrounds Data suggest all had a common
ancestor about 170,000 years ago Distinct branch on the tree about 52,000
years ago, separating Africans from non-Africans
Homo neanderthalensis Appeared in northern Europe about
230,000 years ago Cold-adapted Taxonomic affinities poorly understood
Europe About 34,000 years ago, Homo
neanderthalensis abruptly disappeared Tool makers Lived in huts or caves Dead buried with flowers, food and weapons
Replaced by H. sapiens (Cro-Magnon man) Cro-Magnon man had a lighter body Cave art Probably had full language capabilities
Homo neanderthalensis
North America H. sapiens reached North American
about 13,000 years ago
Brian Sykes
Chardonnay grapes
France
Australia
South Africa
Chile
California
South African fynbos
South African fynbos
South African fynbos
Mediterranean garrigue
Mediterranean garrigue
California chaparral
California chaparral
Australian kwongan
Australian kwongan
Chilean mattoral
Common features of these habitats Hot, dry summers and wet, mild winters All about the same latitude Fire-resistant shrubs with hard leaves Shrubs often with spines
Mediterranean communities The five communities contain more
plant species than tropical Africa and Asia combined
The south European-north African Mediterranean community alone has 20,000 species of angiosperms (out of a total of 250,000 world-wide)
Mediterranean communities
Despite the similarity of the flora, there is little taxonomic affinity among the communities
Rather, each community has species derived from endemic ancestors In southern Europe, oaks dominate In South Africa, heathers dominate In Australia, wattles dominate
Mediterranean communities Wine tastes the same because it is the same Native plants look the same but are distinct The likeness of fynbos, kwongan, mattoral,
chaparral and garrigue reflects five independent responses to the force of natural selection
The native flora, not wine grapes, make the case for evolution
Cape May Warbler
Common Yellowthroat
American Redstart
Chestnut-sided Warbler
Willow Warbler
Wood Warbler
Greenish Warbler
Chiff-chaff
Red Kangaroo
Wombat
Thylacine
Tasmanian Devil
Quoll
Sugar glider
Cuscus
Australian mole
Australian mouse
Wallace’s Line
Oregon salamander
Sierra Nevada salamander
Yellow-eyed salamander
Yellow-blotched salamander
Large-blotched salamander
Monterey salamander
Painted salamander
Herring Gull
Lesser Black-backed Gull