Phase 3 - Green plants and algae produce oxygen Flashcards
1
Q
As well as c02 in atmosphere , green plants and algae produces
A
oxygen by photosynthesies
2
Q
Algae evolved first
A
2.7bn years ago
3
Q
Oxygen levels up leads to what organisms over time
A
more complex life could evolve
4
Q
200m years ago atmosphere composition
A
80% nitrogen , 20% oxygen and small amounts of gases make up less than 1%
