chemosynthetic theory
TRANSCRIPT
Chemosynthetic Theory
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THE
How did life metamorphose from CHEMICAL REACTIONS ?
“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
At first, it seems unbelievable that life is made through a series of chemical
reactions…
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
chemosynthetictheory
methane
ammoniaHydrogen gas
Water vapor
ammonia
phosphatenitrogen
carbon
The Chemosynthetic Theory
Chemosynthesis can be divided into
six stages.
THE FIRST PHASERandom molecules form simple organic molecules with energy provided by the sun.
Hydrocarbon chains
STANLEY MILLER
The Miller-Urey Experiment
THE SECOND PHASE
The simple organic molecules formed in the 1st stage bond to create major organic macromolecules.
Amino acids They combine…Peptides and proteins
hydrocarbonssugars
Fat molecules
carbohydrates They unite…
They form starches & other complex sugars
THE THIRD PHASE
Development of aggregates of molecules, called coacervates.
The macromolecules are organized into bodies of definite shape, unity and properties which resemble those of living things.
They are theorized to have been the early ancestors of cells ! :o
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.
LIFE HAS ARISEN !
AUTOTROPHIC BACTERIA APPEARS…
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 ENZYMESHOW DID ENZYMES COME INTO EXISTENCE?
THEY ARE STRUCTURES THAT ARE EXTREMELY TASK-SPECIFIC.
The Chemosynthetic Theory is still basically impossible to conclusively
prove.
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DE LA PEŃA ALMARIOGUIAM BASCUŃALINSAG DOMINGO MANUEL LO SISON ZOLETA
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