origin and evolution of life class 10

Life appeared on earth about 4 billion years back. Life originally arose from the inorganic molecules of the primitive earth (abiogenesis), but on today’s earth life comes only from the pre-existing life (biogenesis). The central mass condensed further and formed the sun. - EVOLUTION EXPLAINS LIFE, SO GOD ISN T NEEDED Charles Darwin didn t want to murder God, as he once put it. History of Earth s Existence Linnaean Classification system Dear King Phillip Came Over For Good Soup The 3 ... - Creation or Evolution Two views of Origin vs. - Title: Origins of Life: Formation of The Earth Author: Pancho Last modified by: Pancho Created Date: 5/29/2010 9:41:26 PM Document presentation format, Origin and Evolution of Life on Earth Bennett. 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The first cellular form of life possibly did not come into existence till about 2000 million years ago. (4) Abiogenic or naturalistic theory or chemical origin of life: Life originated from inanimate matter by a series of chemical reactions on the primitive earth. Thus, chemical evolution became an accepted theory of origin of life. <>>>/Length 32>> - CrystalGraphics offers more PowerPoint templates than anyone else in the world, with over 4 million to choose from. Because of hazards like low temperatures, very high influx of cosmic and UV radiation, lack of atmosphere, extreme dryness etc, that exist in the interplanetary space and are not conducive to life, this theory of origin of life was rejected. Fundamental characteristics of living organism are: Life as the inherent capacity of living organisms to utilise the outside materials (light, water, gases or food) for energy, growth and reproduction through chemical reactions (metabolism) in a controlled manner. Organic evolution : Darwin’s theory, modern synthesis theory of evolution, geological time scale. :C1���o$)mHG\tS�t����.�O4� �4$/~�OoOƶ�"@�"��� T€c��q"��� ~-4S� QE QE QE -��(�� (�� (�� (�� (�� (�� (�� (�� (��� PPT – The Origin and Evolution of Life PowerPoint presentation | free to view - id: 5677ad-NTQyY, The Adobe Flash plugin is needed to view this content. I. Oparin (1923) and J.B.S. Situation 3: A group of red ants was living in a bush. The liquid was heated to initiate evaporation and electrodes were used to create electric discharge. Extraterrestrial Life The Origin and Evolution of Life on Earth. Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment. • First evidence for early life • The evolution of life • Extreme life on Earth: lessons for astrobiology. Ants of both colours were almost equal in population. These polymers, due to, intermolecular interactions, formed large colloidal aggregates called, Life originally arose from the inorganic molecules of the primitive earth. - Chapter 22 Descent with Modification: A Darwinian View of Life Question? One of the most important concepts in biology, natural selection describes how an organism adapts to its environment. Origin and evolution of life Origin of life : Theories of the origin of life, early earth, modern self assembly theories, Oparin-Haldane theory of chemical evolution of life. Navigate through all biology MCQs for your studies if you are a Class 11th or 12th student or pre-medical entrance preparation. In his book, he even provided a hypothetical example of a black bear that could, over time, gradually evolve into an animal as big as a whale under the select circumstances and factors. More progeny results in better chances of survival. stream RNA, protein, polysaccharides. (�� Thus, chemical evolution became an accepted theory of origin of life. Heredity and Evolution. Question 3 Explain the Cosmozoic or interplanetary theory? Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. How did the diversity of life originate? (3) These gases were believed to prevail in the primitive earth.The mixture was maintained at a temperature just below 100°C. But Louis Pasteur disproved this theory by proving that life comes only from pre-existing life. In fact, Darwin even proposed the idea that the evolution of whales began with organisms that had terrestrial origins. Eventually, the dark-coloured moths thrived as they were able to hide better against the dark barks of the trees. iClicker Question The importance of the Miller-Urey experiment is that A it proved beyond doubt that life ... Chapter 22 Descent with Modification: A Darwinian View of Life. The primitive inorganic molecules later interacted with, another to form simple organic compounds, namely, sugars, fatty acids, glycerol, amino acids and organic, bases (purines and pyrimidines). Subsequent generations comprised of smaller ants and the trend continued for a few generations. Those organisms which are the fittest are able to survive, while others perish. Diverse organic molecules were formed form inorganic constituents during the course of chemical evolution. Observations by some others showed formation of sugars, nitrogenous bases, pigments and fats. Leave a comment Cancel reply. The notion where one type of organism can descend from another type dates back to the Pre-Socratic era. A few attempts have been made to explain the very first origins of life. (�� Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. 1. (�� The first non-cellular forms of life could have originated about 3 billion years ago; in the form of giant molecules, e.g. Organisms which are better fit in an environment leave more progeny than others. RNA, protein, polysaccharides. Evolution: The change in inherited traits in biological population over subsequent generations is called evolution. In olden days, people believed that the universe and life on it was an act and result of God’s creation. When the earth cooled down further, water vapor fell as rain; to form oceans. Natural Selection can lead to the process of evolution, where a group of organisms with certain characteristics have a much higher chance of survival than other groups. endobj What are we going to discuss today? LUCA or the Last Universal Common Ancestor is an organism or a group of organisms from which all life that currently lives on earth has a common descent. These dark coloured moths were also able to pass on the genes that helped them survive predation. Haldane, a british scientist suggested in 1929 that life must, have arisen on the primitive earth from a collection of chemicals through a progressive series of chemical, reactions in which atoms combined into inorganic molecules, inorganic molecules into simple organic, compounds, simple organic compounds into complex organic compounds (polymers), and polymers into, aggregates, which finally got organized into the living matter. Stanley L. Miller and Harold C. Urey, conducted the Miller-Urey experiment in 1953 to demonstrate how the life would have originated on the earth.

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