Module 1

• Theory


  A widely accepted explanation of a biological phenomenon based on sound evidence from rigorous empirical experiments and scientific observations
• Divine Creation Theory


  • Proposes that life on earth is created by a supernatural power, God
• Abiogenesis Theory


  • Also known as Spontaneous Generation Theory
  • Assumes that non-living material in a spontaneous manner gives rise to life
• Biogenesis Theory


  • According to this theory, life can arise from pre-existing living things
• Theory of Catastrophism


  • Assumes that life originated by creation and is followed by catastrophe due to geographical disturbances
  • Each catastrophe destroyed life completely, whereas each creation forms life differently from the previous one
• Theory of Cosmozoic


  • Also known as Theory of Panspermia or Apore Theory
  • Assumes that life was present in the form of resistant spores and appeared on Earth from another planet
  • These spores grew and evolved into different organisms
• Theory of Eternity of Life


  • Also known as Steady State Theory
  • Assumes that life has no beginning or end
  • Believes that life has always existed and will continue to be so
  • No question of the origin of life as it has no beginning or end
• Biogenesis theory was favored most by the scientific community
• Abiogenesis theory proponent are Alexander Oparin and J.B.S Haldane
• Biogenesis Theory proponent is Louis Pasteur
• Catastrophism propenent is bishop James Ussher and Baron georges Cuvier
• Eternity of Lide propenent are Hermann Bondi, thomas gold, fred hoyle