GLGY 209 Lecture Notes - Lecture 24: Alexander Oparin, Reducing Atmosphere, Plant Cell
3 May 2019
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Studying molecules that didn"t have mineralized parts around them is the study of the emergence of life on earth. Sulfur and phosphorous occur in smaller amounts. When we look at the elemental composition of life forms on earth today, see that its constant. Life has a unitary origin, therefore, all the life forms evolved from a primordial organism. Phase 6 (solar nebular theory): period of solar system, approximately 4. 6 billion years when the earth was formed and came into collision with large asteroids. From solar nebular theory, we already know that when the sun ignited, hydrogen and helium were removed from the central part of the solar system, including the atmosphere. That toxic atmosphere was permanently enriched by gases produced and eliminated from earth (degassing). About 80-90 years ago, this was not know. Specialized in studying plant cells which are extremely complex.
