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Evolution is the change in allele frequency due to non random survival and reproduction.
All organisms on Earth extant or extinct were descended from a common ancestor. This is the fact of evolution. The theory of evolution explains the mechanism of how this came to be. There are many driving forces of evolution, these include natural selection, genetic drift, recombination, mutation, migration. To keep it simple, I will explain natural selection only.
Natural selection is the differential survival of genes. Organisms make more offsprings than can survive, due to limiting factors such as food. There is variation amongst organisms, some better equipped to survive in particular environments, some less so. Thus there is a non random survival, where the better adapted individuals on average produce more offsprings than their competition, passing more of their advantageous genes to the next generation, thus evolution occurs.
How does new species arise? When a group of organisms have been isolated by a geographical barrier, or any barrier that prevents them from interbreeding, the two populations diverge and natural selection drives them to adapt to their respective environments, accumulating differences in their genomes in the form of mutations. When enough differences have accumulated, even when the two groups of organisms reunite, their genes would be too different to be able to reproduce. Thus, they became two species.
What else can I help you with?
Is evolution a theory yes or no?
Yes and no. Evolution is an observed biological phenomenon, and therefore fact. Evolutionary theory is a model explaining the things we find in biology and paleontology in terms of what we know about evolution through genetics and population dynamics. The point really is not that evolution can be seen as either as theory or as fact, the point is that it is a factual theory; it is a theory which is so well supported by vast quantities of evidence that it would be unscientific and unreasonable to doubt the validity of that theory. Scientists also do not know everything about the evolutionary history of the Earth, or about exactly how evolution takes place, and research into evolutionary biology continues. Theories can be revised. But in the case of Darwin's Theory of Evolution, although many details have been revised, and additional details are likely to be revised, the essential thesis remains, that life does evolve, and that evolution is the process by which the species we observe today on Earth (including the human race) came into existence. Of that, there is no reasonable doubt. Of course, if anyone has a religious belief which compels them to believe otherwise, that is their privilege, but the pious rejection of science does not lead to a better understanding of reality.
What The work of which scientist caused controversy that still exits today?
The work of Charles Darwin, particularly his theory of evolution by natural selection, caused controversy during his time and continues to be a point of contention between proponents of evolution and those who advocate for creationism or intelligent design. The debate between evolution and creationism is still ongoing in various contexts, such as education, public policy, and religious beliefs.
How did evolution thought?
That, ladies and gentlemen, is a perfect example of a moron asking a question that either does not form a complete thought or is typed incorrectly. This proves that the world is sorely lacking intelligent life.
How do Darwin's findings point to micro evolution but not macroevolution?
Darwin's findings, such as natural selection, provide evidence for microevolution, which involves changes within a species over time. However, they do not offer direct evidence for macroevolution, which involves the formation of new species or higher taxa over long periods. Macroevolution typically requires additional mechanisms, like genetic mutations and genetic drift, to account for larger-scale changes.
What was the most fundamental point of Darwin's thesis?
According to Darwinism's natural selection scenario, nature is an arena in which all creatures are engaged with one another in a fierce struggle for survival, and where weak individuals succumb to the stronger, leading to the extinction of their species.
Scientific alternatives to Darwin's theory of evolution?
Darwin's original theory was formulated over 150 years ago. The modern theory of evolution, while still basically the same as Darwin's, is also significantly different. In either case, there is no scientific alternative to the origin of biodiversity.This is equivalent to how there is no scientific alternative to Atomic Theory.
Does the theory of Evolution disprove the concept of reincarnation?
Evolution was the starting point for Reincarnation.
The galapagos are famous for their contribution to?
The Galapagos islands are famous for being the stimulus point for Charles Darwin´s Theory of Evolution, based primarily upon his later study of finches and their beaks.
How were the dinosaurs created?
Evolution, plain and simple. Google Darwin if you need clarification on the point.
Darwin's claim that all of life descended from a common ancestor is best supported with evidence from?
the fossil record, comparative anatomy, molecular biology, and biogeography. These lines of evidence all point towards a shared ancestry among different species, providing support for Darwin's theory of evolution by natural selection.
Which community reaches a stable point and stops succeeding?
There is no possible form of this as there is nothing that is perfect and Darwin's theory of evolution dictates that animals and plants will always evolve for the better and therefore communities will always be succeeding, both through primary and secondary succession.
Is evolution a theory yes or no?
Yes and no. Evolution is an observed biological phenomenon, and therefore fact. Evolutionary theory is a model explaining the things we find in biology and paleontology in terms of what we know about evolution through genetics and population dynamics. The point really is not that evolution can be seen as either as theory or as fact, the point is that it is a factual theory; it is a theory which is so well supported by vast quantities of evidence that it would be unscientific and unreasonable to doubt the validity of that theory. Scientists also do not know everything about the evolutionary history of the Earth, or about exactly how evolution takes place, and research into evolutionary biology continues. Theories can be revised. But in the case of Darwin's Theory of Evolution, although many details have been revised, and additional details are likely to be revised, the essential thesis remains, that life does evolve, and that evolution is the process by which the species we observe today on Earth (including the human race) came into existence. Of that, there is no reasonable doubt. Of course, if anyone has a religious belief which compels them to believe otherwise, that is their privilege, but the pious rejection of science does not lead to a better understanding of reality.
What The work of which scientist caused controversy that still exits today?
The work of Charles Darwin, particularly his theory of evolution by natural selection, caused controversy during his time and continues to be a point of contention between proponents of evolution and those who advocate for creationism or intelligent design. The debate between evolution and creationism is still ongoing in various contexts, such as education, public policy, and religious beliefs.
What was drawins key point in his proposal?
In Darwin's proposal for the theory of evolution by natural selection, his key point was that individuals with favorable traits are more likely to survive and reproduce, passing on those traits to the next generation. This process leads to gradual changes in species over time, ultimately resulting in adaptation to the environment.
What are current theries that conflict with Darwin's theory what evidence is used to support thses theories?
Current theories that conflict with Darwin's theory of evolution include Lamarckism, which suggests acquired traits can be passed down through generations, and Saltationism, which proposes that large evolutionary changes can happen suddenly. Supporters of Lamarckism cite cases of epigenetics as evidence, while proponents of Saltationism point to instances of punctuated equilibrium in the fossil record to support their claims.
The principal point of the Darwinian theory of evolution by natural selection was that?
Charles Darwin introduced his theory of evolution by natural selection in 1859 as explanation for adaptation and speciation. It was stated that, "principle by which each slight variation, if useful, is preserved."
Is The perfect cosmological principle the basis for the oscillating universe theory?
Yes, the perfect cosmological principle is a key aspect of the oscillating universe theory. This principle suggests that the universe looks the same from any vantage point at any given point in time, which is a fundamental assumption for the oscillating universe model where the universe undergoes cycles of expansion and contraction.
