THEORY ON THE O-WPS Office.pptxnnnnnnnnn

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1. THEORY ON THE ORIGIN OF LIFE

2. Theory of Special Creation

3. Theory of Special Creation was proposed by Spanish monk Father Sudrez All the different forms of life that occur today on Earth have been created by God. This idea is found in the ancient scriptures of almost every religion.

4. Ancient Scriptures Isaiah 45:12 - I made the earth and created man on it; it was my hands that stretched out the heavens, and I commanded all their host. John 1:3 - All things were made through him, and without him was not anything made that was made.

5. Cosmozoic Theory

6. Cosmozoic Theory This idea was proposed by Richter (1865) and Helmholtz (1884) and supported by Arrhenius (1908). According to this theory, life has reached planet Earth from other heavenly bodies such as meteorites, in the form of highly resistant spores of some microorganisms.

7. Theory on Spontaneous Generation

8. Theory on Spontaneous Generation This theory assumed that living organisms could arise suddenly and spontaneously from a non-living matter.

9. Aristotle believed that dead leaves falling from a tree into a pond would transform into fishes and those falling on soil would transform into worms and insects. This theory was disproved by Francisco Redi (1665), Spallanzani (1765), and later by Louis Pasteur (1864) experimentally.

10. Biogenesis Theory

11. Biogenesis Theory Proposes that life originated only from pre-existing life by reproduction and not by non-living or lifeless matter.

12. He concluded that maggots could only form when flies were allowed to lay eggs in the meat, and that the maggots were the offspring of flies, not the product of spontaneous generation. Francisco Redi’s Experiment

13. Francisco Redi’s Experiment

14. Lazzaro Spallanzani’s Experiment He concluded that air contains microorganisms which came in contact with the matter inside the open bottles and is the cause of contamination and formation of microorganisms.

15. Lazzaro Spallanzani’s Experiment

16. Louis Pasteur Experiment Louis Pasteur’s experiment illustrates the fact that the spoilage of liquid was caused by particles in the air rather than the air itself.

17. Louis Pasteur Experiment