Lesson 1 Part 1 Origin Of Life
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It is the oldest Theory. It states that all living organisms are created by a supernatural power
Special Creation Theory
On the 3rd day of creation, God brought forth a living creature. What are those four?
First animal, then fish and birds, land mammals and finally man
It is said that life was the creation of Brahma
Hindu Mythology
It was discarded as it did not stand in scientific arguments
Special Creation Theory
It is that theory of spontaneous generation. Life can arise from non-living matter
Aristotle’s Theory of Spontaneous Generation
He proposed that life arose from onliving material if the material contained pneuma (“vital heart “)
Aristotle
This theory was accepted university for about 2000 years
Aristotle’s Theory
He asserted that the seeds of life are present everywhere in the universe. He coined the term “panspermia” to describe the concept as life travelling between planets as seeds.
Anaxagoras (500-428 BCE)
He refuses spontaneous generation by showing evidence (maggots in meat 🥩)
Francesco Redi’s experiment
He subsequently proposed that “life only comes from life”.Also famous for the “ swan-neck flask experiment”
Louis Pasteur’s Experiment
According to this theory, life did not arise on our planet. Life descended from other previous life-existing planets. [Highly resistance spores]
Cosmozoic Theory
It overall lacks evidence. As living matter cannot survive. In extreme cold, dry days and ultraviolet radiation from the sun required for reaching the earth.
Cosmozoic Theory
“Life formed in the primordial soup”
Oparin-Haldane Hypothesis
It’s associated with the concept of abiogenesis (life emerges from non-living matter)
Primordial soup
Tested Oparin-Haldane Hypothesis
Miller-Urey Experiment
The theory presumes that the “seed” of life exist all over the universe and can be propagated through space, and that life on Earth originated from those seeds.
Panspermia
It is also called “panspermia” and “Spore Theory”
Cosmozoic Theory
Many people believe that life was put on Earth by Divine forces.
Divine Creation
Life arose from non-living matter. It stated that random events probably produced stable molecules that could self-replicate. Which eventually lead to the first cell.
Abiogenesis
Life arises from pre-existing life.
Biogenesis