Human Evolution (Grade 12 NSC Matric Life Sciences): Flashcards
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'Out of Africa' hypothesis
'Out of Africa' hypothesis
Modern humans originated in Africa, then migrated worldwide
When Homo sapiens evolved in Africa
When Homo sapiens evolved in Africa
150,000-200,000 years ago
When humans migrated out of Africa
When humans migrated out of Africa
About 70,000 years ago
Two evidence types for 'Out of Africa' hypothesis
Two evidence types for 'Out of Africa' hypothesis
Genetic evidence (mtDNA) and fossil record
How mitochondrial DNA is inherited
How mitochondrial DNA is inherited
Passed unchanged from mother to child
Why African populations have most mtDNA markers
Why African populations have most mtDNA markers
They are the oldest populations
When humans left Africa (mtDNA evidence)
When humans left Africa (mtDNA evidence)
60,000-70,000 years ago
Where earliest Ardipithecus & Australopithecus fossils found
Where earliest Ardipithecus & Australopithecus fossils found
Only in Africa
Location of oldest Homo sapiens fossils
Location of oldest Homo sapiens fossils
Near Ethiopia's Omo River (195,000-160,000 years ago)
Cradle of Humankind location
Cradle of Humankind location
Gauteng Province, north-west of Johannesburg