The chemosynthetic theory proposes that life originated from a series of chemical reactions. It describes how the first microscopic life could have evolved in six stages: 1) Random molecules formed simple organic molecules with energy from the sun. 2) Simple organic molecules bonded to create major organic macromolecules like amino acids, proteins, sugars, and carbohydrates. 3) These molecules aggregated into coacervates, theorized to be early cell ancestors. 4) Nucleic acids appeared and helped develop the coacervates, improving their organization and marking the beginning of evolution. However, two main difficulties remain in fully explaining how non-living chemicals transformed into living organisms through this process.

1. groupthreepresents...THEChemosynthetic TheoryHow did life metamorphose from CHEMICAL REACTIONS ?

2. “Life is the cumulative product of interactions among the many kinds of chemical substances that make up the cells of an organism.”-Neil A. Campbell

3. At first, it seems unbelievable that life is made through a series of chemical reactions…

4. Scientists have developed a theory that describes how the very first microscopic life could have evolved as a result of a SERIES OF CHEMICAL REACTIONS.This is thechemosynthetictheory

5. ammoniaphosphatenitrogencarbonammoniaHydrogen gasmethaneWater vapor

6. The Chemosynthetic TheoryChemosynthesis can be divided into six stages.

7. THE FIRST PHASERandom molecules form simple organic molecules with energy provided by the sun.STANLEY MILLERHydrocarbon chains

8. The Miller-Urey Experiment

9. THE SECOND PHASE The simple organic molecules formed in the 1st stage bond to create major organic macromolecules.Peptides and proteinsAmino acidsThey combine…sugarshydrocarbonsFat moleculesThey form starches & other complex sugarscarbohydratesThey unite…

10. THE THIRD PHASE Development of aggregates of molecules, called coacervates. They are theorized to have been the early ancestors of cells ! :oThe macromolecules are organized into bodies of definite shape, unity and properties which resemble those of living things.

11. THE 4th, 5th and 6th PHASENucleic Acids appear and help in the development of the coacervates.Nucleic acidsThere is an improvement in organization of the coacervates.It shows the beginning of evolutionary development.AUTOTROPHIC BACTERIA APPEARS…LIFE HAS ARISEN !

12. TWO MAIN DIFFICULTIESThe described transition from chaos to organizationhow did a bunch of chemical elements transform into organized living forms? • The appearance of enzymeshow did enzymes come into existence? THEY ARE STRUCTURES THAT ARE EXTREMELY TASK-SPECIFIC.The Chemosynthetic Theory is still basically impossible to conclusively prove.

13. groupthreeDE LA PEŃA ALMARIOGUIAM BASCUŃALINSAG DOMINGO MANUEL LO SISON ZOLETA