Chemosynthesis

Finally, the sixth and last phase of chemosynthesis is marked by the appearance of autotrophic

bacteria. These organisms were self-sufficient and could directly synthesize nutrients with energy

provided by the sun. This appearance of autotrophic cells marked the beginning of a balance in

the living world that exists even today. 6

Like all theories, the chemosynthetic theory for the appearance of enzymes. How did enzymes come into

origin of cellular life is a speculative explanation existence? Enzymes are biological catalysts which

based upon thought and observation. And, like most reduce the amount of energy needed to initiate a

theories, the chemosynthetic theory is not perfect. chemical reaction. They are structures that are

There are a two main difficulties with the extremely task-specific. Did the enzyme appear

chemosynthetic theory. The first difficulty is the before or after the task appeared? This question is

described transition from chaos to organization - somewhat like the “what came first, the chicken or

how did a bunch of chemical elements transform into the egg?” dilemma. As with any theory about the

organized and living forms? It is very difficult to origin of life, the chemosynthetic theory is basically

imagine that a random system could produce such impossible to conclusively prove. However, despite

an organized and complex structure as the its known imperfections, it is the most rational and

eukaryotic cell. The second difficulty is the available explanation for the evidence at hand.

The chemosynthetic theory implies that the development of

life is probable wherever the proper physical and chemical

conditions are in place. It alsoimplies that all life on Earth

evolved from a common cellular ancestor. There are a number

of molecular similarities between all life forms that indicate

that all life did indeed evolve from a single ancestor. One thing

that supports this is that the molecules of living organisms...