Please enable JavaScript.

Coggle requires JavaScript to display documents.

THE ORIGIN of LIFE, bio maleen, bio maleeen, maleen, bacteria malen, bio…

- - - - Panspermia
        
        Life stats in in space and it was carried to the Earth by meteorites
      - Abiogenesis or Prebiotic synthesis
        
        Several theories:
        
        Primordial soup or broth theory:
        Alexander Oparin + John Haldane derscribed a primitive oxygen-free atmosphere. Composed>gases, creating a great variety of simple molecules.
        Later > more complex, developing membranes + first cell.
        Early atmosphere contained:
        
        Theory of hydrothermal vents:
        More widely accepted. It says: life started in hydrothermal vents, located on the seafloor along the oceans ridges.
        Forces such as wind + strong currents bettered the Earth´s surface.
- - - - It was triggered by a vital force of supernatural origin.
        
        Maggots appear in decomposing meat.
        
        Experiments for spontaneous generation
        
        .
        
        Francesco Redi
        
        RESULT: controversy regarding spontaneous generation
        
        Inserted two pieces of meat into two containers
        One opened and the other closed by gauze.
        Maggots: in the opened one. --> fly larvae.
        
        It showed minuscule microorganisms.
        
        He made a development of a microscope
        
        .
        
        Louis Pasteur
        
        In the other, the contents decomposed.
        
        Observed the broth in the unbroken flask neck.
        Hadn't decomposed.
        
        Poured beef broth into two flasks.
        
        .
        
        2 more items...
        
        DEMONSTRATION:
        Microorganisms in the air--> dust particles.
        Unbroken flask trapped dust--> NO microorganism.
        Broken flask--> Attracted microorganisms: decomposed
        
        All living things come from another one.
        
        Disproved the theory in 1859.

                                                                                                       1. Abundanced of CH4                                                                                                                         2. Nitrogenous produced by volcanic activity. NO ozone layer