Origin of Life

1. What is a Theory? Refresher

Scientists Miller and Urey made an experiment to show that organic molecules could be formed from organic molecules like in early Earth.

This helped back up the Theory of Chemical Evolution: inorganic molecules formed complex organic molecules (the building blocks of life)

1) Primordial Soup: Simple organic molecules (monomers to polymers) were formed

2)Replicating molecules evolved and began to undergo Natural Selection

3)Replicating molecules became enclosed within a cell membrane

4)Formation of Prokaryotes

Some Cells began to evolve modern metabolic processes and out-competed those with older forms of metabolism

Endosymbiotic Theory: Several Key organelles of eukaryotes were once prokaryotes like mitochondria and chloroplasts

5) Cell become to multiply more frequently