How did chemisty and oceans produce this?
Properties of Cells Today:
Prokaryotes precede Eukaryotes by approximately 2 billion years.
Making Polymers Today:
4 Billion years ago there were no cells to facilitate this. The available energy sources were
All of the above are quite inefficient compared to enzymes
Now we have a multiplying population of bacteria (prokaryotes) that has to eat to survive:
What to eat?
EVOLUTIONARY ADVANTAGE: Bacteria that could process plentiful UV light
and INorganic molecules will survive
So, chlorophyll evolves to more complex forms so that it can capture and store enough UV energy to breaking the hydrogen-oxygen bond in water.
Now we have a mechanism to deliver Oxygen to the atmosphere via the aerobic photosynthesis of blue-green algae. But, the oxygen does not initially go into the earth's atmosphere. Instead we have to wait 1.5 -2 billion years to get oxygen into our atmosphere!
___________________________________________________________________The Electronic Universe Project e-mail: firstname.lastname@example.org