Presentation Transcript
Origin of Life: Origin of Life K. Sathasivan
Are we alone?: Are we alone? Yes
No
How do you think life originated on earth?: How do you think life originated on earth? Extraterrestrial aliens brought it
Came with meteors from other planets
Some superhuman powers created it
Chemical from primordial soup combined to make life
None of the above
History of Life: History of Life
Stromatolites: Stromatolites
Early prokaryotes: Early prokaryotes
Cyanobacteria fossils: Cyanobacteria fossils
Possible Sources of Life’s Origin: Possible Sources of Life’s Origin
Possible Steps in the Origin of Life: Possible Steps in the Origin of Life Protobionts and Liposomes
Which came first?: DNA ïƒ RNA ïƒ PROTEIN
(Genetic (Information (Catalytic and Information) and catalytic) Structural)
DNA
RNA
Protein
Carbohydrates
Lipids Which came first?
Abiotic RNA Replication: Abiotic RNA Replication
Primitive RNA and Proteins : Primitive RNA and Proteins
Which of the following is/are testable hypothesis about origin of life on earth?: Which of the following is/are testable hypothesis about origin of life on earth? Extraterrestrial aliens brought it
Came with meteors from other planets
Some superhuman powers created it
Chemical from primordial soup combined to make life
None of the above
The Five Kingdom System: The Five Kingdom System
Domain Systems: Domain Systems