History of Life Flashcards
1
Q
3.5 bya
A
oldest fossils of prokaryotes
- cyanobacteria evolved photosynthesis
2
Q
1.8 bya
A
first eukaryotes
3
Q
eukaryote
A
have membrane bound organelles, nucleus, and are large
4
Q
endosymbiont theory
A
mutant larger cell engulfs small prokaryote and prokaryote functions in large cell
- prokaryote becomes organelle
- large cell gets too big to survive so it starts folding onto itself which forms the nucleus
5
Q
1.2 bya
A
multicellular life
- cell communication
6
Q
540 mya
A
cambrian explosion
- bilateral life
- increase in diversity
7
Q
488-475 mya
A
life moves onto land
- fungi moves onto land
- less competition
- more light for photosythesis
8
Q
250 mya
A
permian extinction
- 96% of life dies due to volcanic activity
9
Q
65 mya
A
mammal explosion
