list in order of appearance the four stages of the origin of life an.pdf

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list in order of appearance the four stages of the origin of life and explain what was necessary to occur in order for life to have evolved in this fashion Solution Evolution occurred in four stages: Stage 1: Initially, it is thought that various small inorganic molecules occurred in the primitive Earth. Hydrogen, ammonia, methane and water vapor were the main components. These molecules combined together to form small organic molecules, which included amino acids. Please note that ultraviolet radiations of the sun aided this process. This phenomenon is known as Abiogenesis. Abiogenesis was important for the beginning of evolution in successive stages. If abiogenesis did not occur, complex molecules (which form from small organic molecules) will never form. Stage 2: In this stage, the simple organic molecules (amino acids) further accumulated to form complex and large organic molecules like proteins (polymers). Water, oxygen, ozone and enzymes evolved into the primitive Earth. This stage was important because, it resulted in the formation of enzymes, the biological catalysts, without which life of present Earth is impossible. Stage 3: Polymers interacted together to form aggregates. These were known as proto-bionts. They had the capability of reproduction. So, abiogenic evolution shifted to biogenic evolution. Now new organisms/life will generate from pre-existing life. This stage was important because of the introduction of concept of evolution. Stage 4: Protobionts generated the ability of reproduction. So, genetic material could be transferred from one generation of other. This stage was important for variation and evolution. RNA was originated, and its work into the living systems was well-established in this stage..

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Life, living matter are those that shows certain attributes that include responsiveness, growth, metabolism, energy transformation and reproduction. In biology origin of life or abiogenesis is the natural process by which life has arisen from non-living matter, such as simple organic compounds. It means the emergence of heritable and evolvable self-reproduction. It is a complex subject and oftentimes controversial. Several attempts have been made from time to time to explain the origin of life on earth. There are several theories which offer their own explanation on the possible mechanism of origin of life.

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List the necessary steps for the Abiotic origin of life theory? Solution Abiotic origin of life theory explains about the synthesis of organic compounds from the non- living molecules. Abiotic origin of life theory explains about the origin of living things from the non-living components. The abiotic origin of life theory says these non-living abiotic molecules might have either originated near the hydrothermal vents or have been come from the space or from the asteroids dust. The abiotic molecules form the organic monomers. These organic monomers assemble to form polymers. These polymers get incorporated into a cell in form of a droplet called protobiont. The organic molecules such as proteinoids form microspheres and liposomes form lipid bilayer within an enclosed water environment. The cell shows the process of replication..

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It is a type of cyclic flow of nutrients between non- living components like soil, rock air and water and living organisms and micro oganism (Pseudomonas and Aeruginosa). It makes the biosphere dynamic. In oxygen cycle there is a cyclic flow of atmospheric oxygen. Photosynthesis releases oxygen in the atmosphere. Respiration absorbs oxygen. By photosynthesis plant produces organic molecules (C6 H12 O6). By respiration that organic molecule is oxidized to release energy and carbon oxide.

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