Evolution of Life (Leaving Cert CASD): Flashcards
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Practise the cards
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Early Earth's atmosphere
Early Earth's atmosphere
No oxygen, high methane levels
Age of first life evidence (microbes)
Age of first life evidence (microbes)
3.7 billion years ago
Stromatolites definition
Stromatolites definition
Hard layered structures from microbes trapping sediments
When cyanobacteria evolved
When cyanobacteria evolved
2.4 billion years ago
Cyanobacteria by-product
Cyanobacteria by-product
Oxygen into the atmosphere
What mitochondria evolved from
What mitochondria evolved from
Microbes living inside other microbes
When first animals appeared
When first animals appeared
800 million years ago
Earliest animal forms included
Earliest animal forms included
Sponges
Cambrian Period timeframe
Cambrian Period timeframe
541-485 million years ago
Burgess Shale significance
Burgess Shale significance
Fossil site showing Cambrian biodiversity