Dr TL Floyd Week 2 Discussion Forum 20 days ago The first living organisms evolv

Question

Dr TL Floyd Week 2 Discussion Forum 20 days ago The first living organisms evolved in a reducing environment which had little free oxygen Then, photosyntheitic prokaryotes arose and began "poisoning" Earth with free oxygen. This event is wirtten in the geology of this planet, and had a profound effect on the evolution of living things 1 How did this ctiemical revolution affect early life? 2. What innovations were made possible? 3. What happened to those first, anaerobic organisms? Where are they found today? What does that say about the primordial earth? Reply

Explanation / Answer

1. The early atmosphere was not having oxygen. The atmosphere was consist of hydrogen, ammonia, water vapour and methane. This gases was fused to form the into some organic substances with the help of ultraviolet radiation of the Sun. Such spontaneous synthesis can appeared in the early atmosphere. If there it was oxygen in the primitive atmosphere, then ozone layer was not able to reach the earth and spontaneous synthesis would not have occur.

2. The spontaneous synthesis of some important amino acid would have occurred in the early atmosphere that composed the proteins present in living beings. Rain marked on organic molecules that allow polymerization of amino acid. Similarly other polymers were made and interacted with each other form protobionts.

3. First anaerobic organism were prokaryotes. They were able to survive without oxygen. They were similar to present day bacteria. They are now found on everywhere on Earth. They give the idea that primitive atmosphere was not having oxygen.

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