Life’s History (Grade 10 NSC Matric Life Sciences): Flashcards
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Earth's age
Earth's age
Approximately 4.6 billion years
Organism that produced O₂ in atmosphere 3 billion yrs ago
Organism that produced O₂ in atmosphere 3 billion yrs ago
Cyanobacteria
Layered structures formed by early bacterial colonies
Layered structures formed by early bacterial colonies
Stromatolites
Time period of Cambrian Explosion
Time period of Cambrian Explosion
580-500 million years ago
When plants colonised land (mya)
When plants colonised land (mya)
Approximately 430 million years ago
Mesozoic era nickname
Mesozoic era nickname
Age of Reptiles
Year coelacanths were rediscovered
Year coelacanths were rediscovered
1983
Cenozoic era nickname
Cenozoic era nickname
Age of Mammals
When Homo sapiens evolved in Africa (Out of Africa theory)
When Homo sapiens evolved in Africa (Out of Africa theory)
200,000-150,000 years ago
Number of major mass extinction events in Earth's history
Number of major mass extinction events in Earth's history
Five