evolution of life

Topics: Metabolism, DNA, Protein Pages: 2 (561 words) Published: April 9, 2014
Evolution of Life
The earth is about 4.54 billion years old and it is evolving throughout its lifetime from a place with volcanoes, serve thunderstorms and limited oxygen. The beginning of the life of earth is occurred due to a process that has set a sequence most practical events towards the foundation of where life actually formed so many years ago. The chemical evolution practical process created inorganic molecules to form organic molecules. Slowly this process of evolution created the foundation of different types of organisms and now we are able to put classification of living organisms from general to specific such as humans and monkeys are from the same family, but we are not the same species. The composition of life is followed under four essentials macromolecules. The macromolecules are carbohydrates, lipids, proteins, and nucleic acids. Three of these four macromolecules are polymers. A polymer is made of several repeated small units called monomers. How the polymers are formed is a method called dehydration synthesis in which the water molecule is removed and two monomers are joined together. When the polymers are breaking down it is process called hydrolysis in when the polymer is mixed with a water molecule and disrupts the bonds between the two monomers. The carbohydrates are the sugar and starches and provide the function of energy to the body of humans. This carbohydrates can come in different sizes and different values overall, such as monosaccharaides, glucose, disaccharides and sucrose. In animals the glycogen is put in short term energy storage such as the liver and muscles. While the plant cell using the carbohydrates in their cell walls to pride the structural to the plants tissues through there cellulose. The Lipids are not polymers and are insoluble in water, creating the idea that they are nonpolar and hydrophobic. The function of the lipid is to store long term energy, form cell membranes and to protect the vital organs. The lipids...
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