Early life Flashcards
1
Q
What are the current theories about where the biomolecules and energy come from?
A
1) Panspermia
2) Primordial soup
3) Hydrothermal vents
2
Q
what is the real world hypothesis?
A
the theory that the original replicating molecule must have both enzymatic and hereditary functions
3
Q
what support is there for the real world hypothesis?
A
- RNA has a similar structure to DNA
- ribosomes exist in modern cells
- RNA can regulate gene expression
4
Q
what is the great oxygenation event?
A
The evolution of oxygenic photosynthetic bacteria (cynobacteria) led to the increase in O₂ in Earths atmosphere
5
Q
what are the three domains?
A
- bacteria
- eukarya
- archaea
