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... THE Chemosynthetic Theory How 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 the chemosynthetic theory

5. ammonia phosphate nitrogen carbon ammonia Hydrogen gas methane Water vapor

6. The Chemosynthetic Theory Chemosynthesis can be divided into six stages.

7. THE FIRST PHASE Random molecules form simple organic molecules with energy provided by the sun. STANLEY MILLER Hydrocarbon 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 proteins Amino acids They combine… sugars hydrocarbons Fat molecules They form starches & other complex sugars carbohydrates They unite…

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

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

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

13. group three DE LA PEŃA ALMARIO GUIAM BASCUŃA LINSAG DOMINGO MANUEL LO SISON ZOLETA