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Darwin's Theory Of Evolution And Natural Selection

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Evolution is a change that happens overtime to a species, the first person to suggest this theory was Charles Darwin. A biologist who spent most his life studying the evolution of several species in this planet. A biologist who revolutionised the world's perspective of the connection between species all over the world. He made a discovery that changed new things in scientific field by taking on evolution and natural selection. The reason for evolution is for organisms to adapt to their current environment and able to repopulate. “Over our evolutionary history, humans have faced many adaptive problems that needed to be solved in order for them to survive and reproduce.” (4) Although there have been skeptics of evolution, there has been profound …show more content…

With our DNA we are able to see the closeness relatedness of species. “Genetics revolves around the study of genes, which are the basic molecular units of heredity that determine which characteristics parents pass on to their children.” (3) If we could be able to date back to our ancestors, we would eventually find a connection between the origins. For example, the theory that humans share an amount of DNA with primates. “Genes carry vital information and instructions that control development and determine what traits, including characteristics… a person will have.” (3) Studying these genes shows resemblance in our chromosomes which shows our relations to each other. Many have misinterpreted this information, and believe that we evolutionized directly from primates but it is not like that. We derived from a common ancestor that we both share. At some point our ancestor evolutionized over a long period of time and dispatched into a different species. DNA comparison is one of the many evidences we have to prove evolutions …show more content…

Fossil records go hand in hand with Biogeography (The distribution of species in different ecosystems). They go hand in hand because, well fossil records are able to show the age of themselves and when being compared, there is a notice of change in them and you can see where the evolution, a very slow process, takes place. For example the evolution of a whale, by gathering older fossils and comparing them to a current fossil of a whale, it is whales evolution is noticeable. The nostrils on them keep getting higher to the top of their head and you could see the steps of evolution. Biogeography is when certain species are distributed around the world but are very similar, to prove once again that a common ancestor is being shared. “By techniques such as carbon dating and studying the placement of fossils within the ground, an age can be assigned to the fossil, by placing fossils together based on their ages, gradual changes in form can be identified.” (1) Another example would be that of horses coming from smaller species before them. The way that that was determined was because when they found the older fossils and compared them to a horse, and there were similar bone structures. This ties in with the other factors of evolution. Not only are the species examples of fossil records, but rocks as well. The more layers there are on top of each other the more change has gradually happened over time, and the more the

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Ancestors in Our Genome, addresses the continuingly advancing disagreement upon whom our closest ancestor is within the great apes, described as the hominoid trichotomy debate. The author, Eugene E. Harris examines many different sources of evidence within the book, and with the help of improvements in biological and DNA technology he helps discover who our closest ancestors were. Also when we were first separated from them and how the separation took place. Although there have been many recent advances in technology, a large number of unanswered questions are still a mystery within our genome and evolution from the great apes. Chapter one discusses the debate of morphology - studying fossil evidence of the great apes - versus molecular

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With over 8.7 million different types of species on earth, it is difficult to see how a singular unicellular organism evolved and adapted to form the human and the rest of these species. With a large amount of the human evolutionary record discovered, it is clear that humans are apart of the order primates and share their closest relatives in this group. Other primates include gorillas, monkeys, lemurs and around 300 more species. Due to the fact that this order is so large, there are many similarities between the different species. Although there are similarities between the species, like the Western Lowland gorilla and the Black-handed Spider monkey, the majority of the comparisons are differences.

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As Darwin would describe the hominid transition, us humans were better fit to survive and reproduce on Earth’s landscape. Our superiority drove the Neanderthals to extinction. An article published in Science compares the 4 billion nucleotide DNA sequence of the Neanderthals to modern day humans. The researchers identify a number of genomic regions that may have been affected by positive selection, including genes involved in metabolism and in cognitive and skeletal development. Genetic sequencing studies support this claim as well.

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In Neil Shubin’s book Your Inner Fish the genetic blueprint of human life, and all animal life, is revealed. The book’s main message is that everything, every feature humans or any other animal can have, is part of the same genetic history. The features and mechanisms that make up our bodies have evolved through “descent with modification” over time. Slight changes to cells, bones, and genes have all culminated into new species that while different still carry reminders of their evolutionary past. When most learn of evolution they learn humans and primates evolved from a common ancestor, and they stop there, they do not look any further.

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In the preliminary biological account of homicide, biologists found similarities in appearance to that of our ancestors, the simian.

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They can tell what the conditions were when the fossil was fossilized. Sedimentary structures are important for geologists because each one is a clue that can be interpreted by geologists about the rock’s origin and history. Question 11. List some important rock types and their uses (igneous,

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One of the main arguments that Darwinsts use is the argument that fossils are evidence of evolution. I have gathered information from Your Inner Fish and internet sources. I found an article online that says in a nutshell; there 's two lines of evidence for evolution. The first line of evidence concerns the order in which fossils are found buried. Fossils are generally found buried in a sequential order.

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On October 20, 2015, Subway restaurants announced an antibiotic-free policy. The announcement earned great disapproval from the livestock industry. Ranchers in Kansas are upset with the company for changing to antibiotic-free meats. Rhonda Stithem, from that cattle ranch in Kansas, says they says they have lots of mouths to feed and they have safe food in places to do that. Sometimes they antibiotics if one cow falls ill.

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Of all the animals to have ever walked our Earth, humans are by far the most intelligent and socially adept. To think we emerged from the same common ancestor as a tomato billions of years ago is staggering, yet true. Much more recently, though, humans broke off from our relatively similar ape ancestors, that physically resemble a cross between us and other living primates. Though we do not have direct links in all cases, tracing our history and evolution is interesting, and by looking to the past, we can see into the future. Possible ancestors include Australopithecus afarensis, africanus, and robustus, as well as Homo habilis, which all have near-human traits.

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xplain how each of the following provide evidence supporting evolution. Provide at least one specific example of each. a. Transitional fossils: Transitional fossils are the missing links between animals we see today and their ancestors. During evolution, many animals developed adaptations and evolved over time to be better suited for life on Earth. An example of a transitional fossil is Pakicetus, which is an early ancestor to today’s whales.

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If the fossil record supported macroevolution, then it would show a progression of simple to more complex structures. The fossil record actually shows an explosion of life in the Cambrian rock layer. The Precambrian rock layer shows bacteria and a few multicellular organisms, and then the Cambrian rock includes several complex structures including marine life,

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Stated in this source Wilkins, Alasdair. " How Mitochondrial Eve Connected All Humanity and Rewrote Human Evolution." Also there is a theory that different groups of humans evolved in different regions about 2 million years ago. Their is a lot of controversy on this topic but as stated before 2 million years ago different humans spread out across the world and adapted to different environments, 2 million years ago “our predecessor Homo

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We have technology that can examine the DNA of humans and compare it to DNA from other living organisms. Darwin’s theory is that humans are the result of evolution from the ape. With the world ever developing , the theory is that the ape developed into a Neanderthal and the finally into a human. This theory may be believable, as according to Dr. Nolan in Greer’s article “Neanderthals are 99.5% genetically identical to humans, and chimps and apes are 96-97% identical” – this shows that there are similarities between humans and both Neanderthals and apes , however the majority of people disagree with this theory as they say there is too much of a difference. This is what people feel when the statistics show similarity of a minimum of 96% similar.

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The process by which humans originated from apelike ancestors are known to be called human evolution. Evolution occurs when there is a change in DNA. Over the years, human evolution has been a big question of our society. Evolution doesn’t just happen to a single individual; it happens to population over a long period of time. (Potts, 2016) C. Loring Brace and Milford Wolpoff hypothesized that only one species existed earlier in life, that were not yet homo sapiens (Lewin, 1984), which brings about the question: how did we change into such creatures overtime?

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Speciation is the evolutionary process by which new species are formed. This process is responsible for species diversity over geologic time. Another example of biodiversity evolution is genetic biodiversity. Genetic biodiversity is the variation of the genes that exist within a specific species. Maintaining a genetic diversity gives the population protection against change, which allows it to evolve and adapt to a new environment.

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