Creation Vs Evolution Essay Example For Students

Creation Vs Evolution Essay There are many different life forms on earth. New species and different sub species are evolving every second as others die out. In order to explain the origin of life, people have used the bible story of creation, while others came up with their own theories. Out of all those theories, the theory of evolution by Charles Darwin seems to have the most supporting evidence to back it up. Evidence on earth suggests that single cell creatures are the ancestors of all life. These organisms slowly evolved into air breathing creatures when oxygen was created. Slowly, the as land dried up, these creatures moved away from the water and on to land where they evolved legs and a strong back bone. The theory of evolution by Charles Darwin explained how life evolved from survival of the fittest, it provides a logical explanation of the evolutionary process these creatures took, and how human came to be. Evidence on earth shows that single cell organisms eventually evolved to multicelled organisms and complex beings. If you look at old fossil records, the oldest fossils are all single cell creatures. These simple creatures do not require oxygen to live. It took in energy from the sun and other energy sources. Slowly as oxygen begins to appear on Earth, some of the organisms began to evolve lungs to breathe oxygen because When free oxygen entered the picture. Breathing is more efficient than drawing energy from the fermentation process that earlier microscope life used. (Science: Biology Pg. 36) Other organisms that did not evolve lungs either died out or went down to deeper depths of the ocean; Oxygen was first consider a pollutant by microscopic creatures. (Evolution Pg. 36) Because of the free Oxygen those who did not change were killed. The evolution through natural selection and survival of the fittest shows that Darwin theory is correct. Due to the lack of oxygen within the ocean , fish slowly evolved to the condition of land. Due to the sudden increase in the population of fish and other marine organism. Due to the sudden increase in the population of marines life, the oxygen level within the ocean decreased. Scientist believe that the lung fish evolved because of a lack of oxygen in the sea. The lung fish learned to rise from the sea and breathe in the oxygen necessary for survival. (Evolution evidence Pg. 38) As more land emerges and dry, rain collected and formed fresh water lakes and rivers. Some of the fish became stranded by the receding ocean. Many fish that became stranded died because they were not able to adapt to the new environment; those fish needed salt water to lived died. But some adapted to their environment. (Evolution Pg. 38) The lobe fin fish was another evolutionary path fish toke to avoid the lack of oxygen in the sea. Fossil record shows that lobe finned lung fish took another evolutionary path. (Microsoft Encarta Pg. 2) The lobe fin fish was almost capable of leaving the water. It only needed more muscles in the joints to be able to lift it self up, because of this many people believe that the lobe fin fish was the ancestor of early reptilian creatures. The different evolutionary paths the fish have taken shows that life changes in responses to different environmental conditions. Fossil records in South America, reveals that there are many sub species of the human race. The fossil of Neanderthal man was discover shortly after Darwin published his book on evolution.. The Neanderthal man was consider to be an ancestor of mankind because of the size of the skull which suggested that it had a small brain. The sloping forehead is also an indication that it is a ancestor of the human race. Not long after the discovery of the Neanderthal was found in the 1890s. This fossil was called the Java Man, the Java Man was not consider the missing link between humans and apes. Language Arts Intervention Programs Increase Student Achievement EssayScientists also noticed that embryos of many different animals looked so similarthat it was hard to tell them apart. Embryos are organisms at early stages ofdevelopment. These similarities show that similar genes are present. The factthat early development of fish, birds, and humans is similar shows that theseanimals share a common ancestor, who had a particular gene sequence thatcontrolled its early development. That sequence has been passed on to thespecies that descended from it. In the embryos of many animals the limbs thatdevelop look very similar. But as the embryos mature, the limbs grow into arms,legs, flippers that differ greatly in form and function. These differentforelimbs evolved in a series of evolutionary changes that altered the structureand appearance of the arm and leg bones of different animals. Each type of limbis adapted in a different way to help the organism survive in its environment. Structures like these, which meet different needs but develop from the same bodyparts, are called homologous structures. This is all additional evidence ofdescent from a common ancestor. There are other theories for the origin ofspecies including special creation and panspermia. Special creation involveshumans. Many people believe that humans were created by God; so the theories ofevolution go against their religions especially why they do not see Godshands in the process. As for panspermia, it suggests that life could haveoriginated somewhere else and came to us from space. This might be possible butthere is actually no supporting evidence for it. Paleontology has also played abig role in the study of evolution. Over the years, paleontologists havecollected millions of fossils to make up the fossil record. The fossil recordrepresents the preserved history of the Earths organisms. Paleontologistshave assembled great evolutionary histories for many animal groups. An examplewould be lo oking at probable relationships between ancient animals whoseevolutionary line gave rise to todays modern horse. The fossil record alsotells us that change followed change on Earth. Scientists can use radioactivityto determine the actual age of rocks. In rocks, radioactive elements decay intonon-radioactive elements at a very steady rate. Scientists measure this rate ofradioactive decay in a unit called a half-life. A half-life is the length oftime required for half the radioactive atoms in a sample to decay. Eachradioactive elements has a different half-life. Carbon-14 is particularly usefulbecause it can be used to date material that was once alive. Because carbon-14is present in the atmosphere, livings things take it into their bodies whiletheyre alive. So the relative amount of carbon-14 in organic material cantell us how long ago this material stopped taking in new carbon into its system. That was the time it died. Then, a graph is used to determine the time. This isthe way scientists can deduce the approximate age of materials based on a simpledecay curve for a radioisotope. In organisms, variations in specific moleculescan indicate phylogeny; and biochemical variations can be used as anevolutionary clock. Phylogeny is the line of evolutionary descent. Biochemistrycan be used to support other evidence about revolutionary relationships, and itcan be very simple. Scientists study similar molecules in different species anddetermine how much difference there is between the molecules. The moredifference there is, the longer the time-span since the two species shared acommon ancestor. The most commonly used substances in this technique arehemoglobin , cytochrome c, and nucleic acids. Hemoglobin is suited to studyingcloser related organisms that contain hemoglobin. Cytochrome c has been used tocompare groups that are more different. The results from comparativebiochemistry lone do not prove anything, but they confirm data found using othermethods. Together, they become convincing. Today, the theory of evolution isgenerally considered to be the most important fundamental concept in thebiological sciences. Nearly all scientists support it. However, large numbers ofpeople opposed the theory when it was introduces. Still, some people do notaccept it today. Bibliography1. Arms, Camp. Chapter 17, Evolution and Natural Selection,Chapter 21, Origin of Life. Biology. Bonnie Boehme. Fourth Edition. The United States of America. Harcourt Brace College Publishers; 1995. Pages352-372, 440-455 2. Curtis, Barnes. Chapter 46, Evolution: Theory andEvidence, Chapter 48,Natural Selection, Chapter 49 Onthe Origin of Species. Biology. Sally Anderson. Fifth Edition. New York,USA; Worth; 1989: Pages 961-973, 991-1029 3. Roberts, M.B.V. Chapter 34, Evolution in Evidence, Chapter 35,The Mechanism of Evolution,Biology. Fourth Edition. Surrey, UK; Nelson; 1986: Pages 560-616 4. The WorldBook Encyclopedia. World Book, inc. London: v.6; Pages 406-413Evolution. 5. Encyclopedia Britannica. Encyclopedia Britannica, inc. Chicago: v.4; Page 623 Evolution. 6. http://www.talkorigins.org/origins/faqs-evolution.html7. http://www.wku.edu/smithch/index1.htm 8. http://bioinfo.med.utoronto.ca/lamoran/Evolution_home.shtml