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The Berkeley Evolution Site<br><br>Teachers and students who visit the Berkeley site will find a wealth of resources to aid in understanding and teaching evolution. The materials are organized in various learning paths that can be used in a variety of ways like "What does T. rex look like?"<br><br>Charles Darwin's theory of natural selection states that over time creatures that are more adaptable to changing environments survive and  [https://kohealthco.or.kr/member/login.html?noMemberOrder=&returnUrl=https%3a%2f%2fevolutionkr.kr 에볼루션게이밍] those that do not become extinct. Science is about this process of evolutionary change.<br><br>What is Evolution?<br><br>The word evolution has many nonscientific meanings, including "progress" or "descent with modification." Scientifically, it refers to a changing the characteristics of living things (or species) over time. This change is based in biological terms on natural drift and selection.<br><br>Evolution is a fundamental tenet in modern biology. It is a concept that has been verified by a myriad of scientific tests. In contrast to other theories in science, such as the Copernican theory or the germ theory of disease, evolution does not address questions of spiritual belief or God's existence.<br><br>Early evolutionists like Erasmus Darwin (Charles’s grandfather) and Jean-Baptiste Lamarck believed that certain physical traits were predetermined to change in a step-like fashion over time. They called this the "Ladder of Nature" or scala naturae. Charles Lyell first used this term in 1833 in his Principles of Geology.<br><br>In the early 1800s, Darwin formulated his theory of evolution and published it in his book On the Origin of Species. It claims that different species of organisms share an ancestry that can be determined through fossils and other lines of evidence. This is the modern view of evolution, and is supported by many research lines in science which includes molecular genetics.<br><br>While scientists don't know exactly how organisms developed but they are certain that the evolution of life on earth is the result of natural selection and genetic drift. People with desirable traits are more likely to survive and reproduce, and they pass their genes on to the next generation. In time this leads to an accumulation of changes to the gene pool, which eventually create new species and forms.<br><br>Some scientists also employ the term evolution to refer to large-scale evolutionary changes such as the creation of the new species from an ancestral species. Certain scientists, such as population geneticists, define the term "evolution" in a more broad sense by referring to the net variation in the frequency of alleles over generations. Both definitions are acceptable and accurate, although some scientists argue that the allele-frequency definition omits important features of the evolutionary process.<br><br>Origins of Life<br><br>A key step in evolution is the emergence of life. This happens when living systems begin to develop at the micro level,  [https://jackfield.co.kr/member/login.html?noMemberOrder=&returnUrl=https%3a%2f%2fevolutionkr.kr 에볼루션카지노사이트] within individual cells, for example.<br><br>The origins of life is one of the major topics in various disciplines that include geology, chemistry, biology and chemistry. The question of how living things started has a special place in science due to it being a major challenge to the theory of evolution. It is often referred to "the mystery" of life or "abiogenesis."<br><br>Traditionally, the idea that life can arise from nonliving things is known as spontaneous generation or "spontaneous evolution." This was a common belief before Louis Pasteur's experiments showed that it was impossible for the creation of life to occur by an entirely natural process.<br><br>Many scientists still think it is possible to go from living to nonliving substances. The conditions needed to make life are not easy to reproduce in a lab. This is why scientists investigating the nature of life are also keen to understand the physical properties of early Earth and other planets.<br><br>The growth of life is dependent on a number of complex chemical reactions, that are not predicted by simple physical laws. These include the transformation of long information-rich molecules (DNA or RNA) into proteins that carry out functions as well as the replication of these intricate molecules to generate new DNA or RNA sequences. These chemical reactions are comparable to the chicken-and-egg issue that is the emergence and growth of DNA/RNA, protein-based cell machinery, is necessary to begin the process of becoming a living organism. But without life, the chemistry that is required to enable it is working.<br><br>Abiogenesis research requires collaboration among researchers from different fields. This includes prebiotic scientists, astrobiologists and planetary scientists.<br><br>Evolutionary Changes<br><br>The word evolution is usually used to refer to the accumulated changes in the genetic traits of populations over time. These changes can result from the response to environmental pressures as explained in the article on Darwinism (see the entry on Charles Darwin for background) or natural selection.<br><br>This latter mechanism increases the number of genes that offer an advantage for survival in an animal, resulting in an overall change in the appearance of the group. The specific mechanisms that cause these changes in evolutionary process include mutation or  [https://podosinki-park.ru/bitrix/redirect.php?goto=https://evolutionkr.kr/ 무료에볼루션] reshuffling genes during sexual reproduction, and gene flow between populations.<br><br>Natural selection is the process that makes beneficial mutations more frequent. All organisms undergo mutations and reshuffles of genes. As noted above, individuals with the beneficial trait have a higher reproductive rate than those who do not. This variation in the number of offspring born over a long period of time can cause a gradual change in the average number of beneficial characteristics in a group.<br><br>A good example of this is the increase in the size of the beaks on different species of finches in the Galapagos Islands, which have developed beaks with different shapes that allow them to easily access food in their new environment. These changes in shape and form can aid in the creation of new organisms.<br><br>The majority of changes are caused by a single mutation, although sometimes multiple occur at the same time. Most of these changes can be negative or even harmful however, a small percentage could have a positive impact on survival and reproduction with increasing frequency as time passes. Natural selection is a process that causes the accumulating change over time that leads to the creation of a new species.<br><br>Many people confuse the concept of evolution with the notion that traits inherited can be changed through conscious choice or use and abuse, a concept called soft inheritance. This is a misunderstood understanding of the nature of evolution and of the actual biological processes that lead to it. A more accurate description of evolution is that it is a two-step process involving the independent and often antagonistic forces of mutation and natural selection.<br><br>Origins of Humans<br><br>Humans of today (Homo sapiens) evolved from primates - a group of mammals that includes chimpanzees and gorillas and  [https://www.categorizer.io/website/evolutionkr.kr 에볼루션] bonobos. The earliest human fossils indicate that our ancestors were bipeds. They were walkers on two legs. Genetic and biological similarities suggest that we are closely related to Chimpanzees. In fact we are the most closely with chimpanzees in the Pan Genus that includes pygmy and pygmy chimpanzees and bonobos. The last common ancestor shared between modern humans and chimpanzees dated 8 to 6 million years old.<br><br>In the course of time, humans have developed a number of traits, including bipedalism and the use of fire. They also invented advanced tools. It is only within the last 100,000 years that we've developed the majority of our important traits. These include a large, complex brain and the capacity of humans to create and use tools, and the diversity of our culture.<br><br>Evolution happens when genetic changes allow members of a population to better adapt to their surroundings. This adaptation is triggered by natural selection, a process that determines certain traits are preferred over others. People with better adaptations are more likely to pass on their genes to the next generation. This is the process that evolves all species, and it is the basis of the theory of evolution.<br><br>Scientists call it the "law of Natural Selection." The law says that species that have a common ancestor are more likely to develop similar characteristics over time. This is because these traits help them to survive and reproduce within their environment.<br><br>Every living thing has a DNA molecule, which provides the information necessary to control their growth and development. The structure of DNA is composed of base pair which are arranged in a spiral, around phosphate and sugar molecules. The sequence of bases within each strand determines phenotype which is the person's distinctive appearance and behavior. A variety of changes and reshuffling of genetic material (known as alleles) during sexual reproduction cause variation in a population.<br><br>Fossils of the earliest human species, Homo erectus and Homo neanderthalensis have been discovered in Africa, Asia, and Europe. These fossils,  [https://apapoyo.hatenablog.jp/iframe/hatena_bookmark_comment?canonical_uri=https%3A%2F%2Fevolutionkr.kr 에볼루션 사이트] despite variations in their appearance, all support the hypothesis that modern humans' ancestors originated in Africa. The evidence from fossils and genetics suggests that the first humans left Africa and moved to Asia and Europe.