Life on Earth Flashcards
1
Q
Origins of forests
A
Mid devonian - earliest trees
2
Q
Cambrian Explosion (570 Ma)
A
Predators and prey
- evolutionary race to advance hunting
- compound eyes - hunting
- hard shells - defensive
3
Q
Ediacaran Period
A
Eukaryotes
- abundancy of multicellular life
4
Q
Co-evolution of Earth and Life
A
- accreted slowly from comets/asteroids
- impact rate increase at 3.9 billion yrs ago
5
Q
Life evolved
A
3.5 Ga
6
Q
Metabolism
A
- changed chemistry of Earth’s atmosphere
- early earth metabolism: Methane based
