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The Academy's Evolution Site<br><br>Biological evolution is a central concept in biology. The Academies have been active for a long time in helping people who are interested in science comprehend the concept of evolution and how it affects every area of scientific inquiry.<br><br>This site provides students, [https://nerdgaming.science/wiki/15_Top_Pinterest_Boards_Of_All_Time_About_Evolution_Slot ์๋ณผ๋ฃจ์ ์ฝ๋ฆฌ์] ์ฌ์ดํธ ([http://www.80tt1.com/home.php?mod=space&uid=2476546 Www.80Tt1.com]) teachers and [https://yogicentral.science/wiki/A_TimeTravelling_Journey_How_People_Talked_About_Evolution_Gaming_20_Years_Ago ์๋ณผ๋ฃจ์ ์ฌ๋กฏ] ๋ฃฐ๋ ([http://www.haidong365.com/home.php?mod=space&uid=319563 www.haidong365.com]) general readers with a variety of learning resources on evolution. It also includes important video clips from NOVA and WGBH produced science programs on DVD.<br><br>Tree of Life<br><br>The Tree of Life, an ancient symbol, symbolizes the interconnectedness of all life. It is a symbol of love and unity in many cultures. It can be used in many practical ways as well, such as providing a framework to understand the history of species and how they react to changing environmental conditions.<br><br>The earliest attempts to depict the world of biology focused on separating organisms into distinct categories that were distinguished by physical and metabolic characteristics1. These methods, which rely on the sampling of various parts of living organisms or on small fragments of their DNA, significantly expanded the diversity that could be represented in a tree of life2. The trees are mostly composed by eukaryotes, and bacteria are largely underrepresented3,4.<br><br>Genetic techniques have significantly expanded our ability to represent the Tree of Life by circumventing the requirement for direct observation and experimentation. Particularly, molecular techniques enable us to create trees by using sequenced markers like the small subunit ribosomal gene.<br><br>The Tree of Life has been dramatically expanded through genome sequencing. However, there is still much diversity to be discovered. This is particularly relevant to microorganisms that are difficult to cultivate, and are typically found in one sample5. A recent analysis of all genomes that are known has produced a rough draft of the Tree of Life, including many bacteria and archaea that have not been isolated and which are not well understood.<br><br>This expanded Tree of Life can be used to evaluate the biodiversity of a specific area and determine if particular habitats need special protection. The information can be used in a range of ways, from identifying new treatments to fight disease to improving crops. The information is also incredibly beneficial for conservation efforts. It can help biologists identify areas most likely to be home to species that are cryptic, which could have vital metabolic functions, and could be susceptible to human-induced change. While conservation funds are important, the best method to protect the world's biodiversity is to empower more people in developing countries with the information they require to act locally and promote conservation.<br><br>Phylogeny<br><br>A phylogeny, also called an evolutionary tree, shows the connections between various groups of organisms. Scientists can construct a phylogenetic diagram that illustrates the evolutionary relationship of taxonomic groups based on molecular data and morphological differences or similarities. The role of phylogeny is crucial in understanding biodiversity, genetics and evolution.<br><br>A basic phylogenetic Tree (see Figure PageIndex 10 ) identifies the relationships between organisms that share similar traits that evolved from common ancestral. These shared traits can be either analogous or homologous. Homologous traits are similar in terms of their evolutionary journey. Analogous traits could appear similar but they don't share the same origins. Scientists group similar traits together into a grouping called a Clade. All members of a clade share a characteristic, like amniotic egg production. They all evolved from an ancestor who had these eggs. A phylogenetic tree can be constructed by connecting clades to identify the species who are the closest to one another. <br><br>Scientists make use of DNA or RNA molecular information to build a phylogenetic chart that is more precise and precise. This information is more precise and gives evidence of the evolution of an organism. The analysis of molecular data can help researchers determine the number of species that share an ancestor common to them and estimate their evolutionary age.<br><br>Phylogenetic relationships can be affected by a variety of factors such as phenotypicplasticity. This is a type of behaviour that can change due to specific environmental conditions. This can cause a trait to appear more like a species other species, which can obscure the phylogenetic signal. This problem can be mitigated by using cladistics, which is a a combination of homologous and analogous traits in the tree.<br><br>In addition, phylogenetics can aid in predicting the length and speed of speciation. This information can assist conservation biologists in making choices about which species to safeguard from disappearance. In the end, it's the preservation of phylogenetic diversity that will lead to an ecosystem that is complete and balanced.<br><br>Evolutionary Theory<br><br>The central theme of evolution is that organisms develop various characteristics over time due to their interactions with their surroundings. Many scientists have proposed theories of evolution, such as the Islamic naturalist Nasir al-Din al-Tusi (1201-274), who believed that an organism would evolve according to its own requirements as well as the Swedish taxonomist Carolus Linnaeus (1707-1778), who created the modern hierarchical taxonomy, as well as Jean-Baptiste Lamarck (1844-1829), who believed that the use or absence of traits can cause changes that are passed on to the<br><br>In the 1930s and 1940s, concepts from a variety of fields--including natural selection, genetics, and particulate inheritance - came together to create the modern evolutionary theory, which defines how evolution is triggered by the variation of genes within a population, and how those variants change over time as a result of natural selection. This model, which includes mutations, genetic drift in gene flow, [https://ucgp.jujuy.edu.ar/profile/cardsyria0/ ์๋ณผ๋ฃจ์ ๊ฒ์ด๋ฐ] and sexual selection is mathematically described.<br><br>Recent discoveries in the field of evolutionary developmental biology have revealed how variation can be introduced to a species by genetic drift, mutations and reshuffling of genes during sexual reproduction and the movement between populations. These processes, along with others such as directional selection or genetic erosion (changes in the frequency of the genotype over time), can lead to evolution, which is defined by change in the genome of the species over time, and also the change in phenotype over time (the expression of the genotype in the individual).<br><br>Students can gain a better understanding of the concept of phylogeny through incorporating evolutionary thinking throughout all aspects of biology. A recent study by Grunspan and colleagues, for example revealed that teaching students about the evidence supporting evolution helped students accept the concept of evolution in a college-level biology course. For more details about how to teach evolution look up The Evolutionary Potency in All Areas of Biology or Thinking Evolutionarily A Framework for Infusing Evolution into Life Sciences Education.<br><br>Evolution in Action<br><br>Traditionally scientists have studied evolution by looking back, studying fossils, comparing species, and studying living organisms. But evolution isn't just something that occurred in the past; it's an ongoing process, taking place right now. Viruses reinvent themselves to avoid new drugs and bacteria evolve to resist antibiotics. Animals alter their behavior as a result of the changing environment. The changes that result are often evident.<br><br>It wasn't until late-1980s that biologists realized that natural selection could be seen in action, as well. The key is that different traits confer different rates of survival and reproduction (differential fitness) and are passed down from one generation to the next.<br><br>In the past, if an allele - the genetic sequence that determines colour was present in a population of organisms that interbred, it could be more common than any other allele. In time, this could mean the number of black moths in a population could increase. The same is true for many other characteristics--including morphology and behavior--that vary among populations of organisms.<br><br>The ability to observe evolutionary change is much easier when a species has a fast generation turnover, as with bacteria. Since 1988, Richard Lenski, a biologist, has tracked twelve populations of E.coli that descend from a single strain. Samples of each population have been taken frequently and more than 500.000 generations of E.coli have passed.<br><br>Lenski's research has demonstrated that mutations can alter the rate of change and the rate of a population's reproduction. It also shows that evolution takes time, a fact that some people find difficult to accept.<br><br>Microevolution can be observed in the fact that mosquito genes that confer resistance to pesticides are more prevalent in areas that have used insecticides. This is due to pesticides causing an enticement that favors individuals who have resistant genotypes.<br><br>The rapidity of evolution has led to a growing appreciation of its importance, especially in a world which is largely shaped by human activities. This includes climate change, pollution, and habitat loss, which prevents many species from adapting. Understanding evolution will help you make better decisions about the future of our planet and its inhabitants.
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