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What did Mayr take from Darwin's work?
Mayr showed that Charles Darwin's theory of natural selection applies to the evolution of genes at the molecular level.
What type of selection that humans control?
Artificial selection.Artificial selection is the selection, by humans, of which individual plants or animals to breed from. In this way desirable characteristics, such as increased yield or disease resistance, can be preserved or improved.Charles Darwin used artificial seletion as a model for how evolution could take place in nature, where competiton between individuals replaced the selective action of humans. He called the natural process 'natural selection'.See http://evolution.berkeley.edu/evosite/evo101/IIIE4Evochange.shtmlfor an excellent account.
Can someone help you compare and contrast natural selection and evolution any help would be great?
Evolution is simply genetic change within a poulation. That change can occur in several ways. One is immigration/emigration: individuals moving in or out of a population bring in or take out their alleles with them. Another is genetic drift, or chance events which cause the frequencies of alleles in a population to fluctuate. New mutations can change the allelic frequency as well. Finally, natural selection can cause some alleles to become more common at the expense of others. In short, natural selection is one of several mechanisms that can bring about evolution.
What is the smallest group of organisms in which evolution can take place?
The smallest group of organisms wherein evolution can take place is a population. This is because all methods of evolution require chromosomes from more than one organism.
Is evolution directional?
No, evolution is not directional as the definition is; the change in allele frequency over time in a population of organisms. Google barnacle to see that evolution has no particular direction, but the adaption of the organism to the immediate environment.
Was it absolutely necessary for natural selection to take place?
Genetic change is necessary for natural selection to take place
Where did natural selection take place?
Everywhere where there is life.
How long does the process of natural selection and evolution take?
The process of natural selection and evolution can vary in terms of the time it takes, ranging from hundreds to millions of years depending on the species and environmental factors. Evolution is a gradual process that occurs over generations as populations adapt to their changing surroundings through natural selection.
Describe how natural selection is related to organic evolution?
Organic evolution is the process by which the genetic makeup of a species changes over time. There are several mechanisms by which this can happen: natural selection, genetic drift (chance), migration and mutation. So natural selection is one possible way in which evolution can take place. Most biologists agree that natural selection is the most important mechanism of evolution. This mechanism was first discovered by Charles Darwin and, independently. by Alfred Wallace.
What are two ways scientist believed that evolution can take place?
Two ways scientists believe evolution can take place are through natural selection, where organisms with beneficial traits have a higher chance of surviving and reproducing, passing those traits on to their offspring; and genetic mutations, which can introduce new genetic variations that may be advantageous in certain environments.
What must happen for evolution by natural selection to take place?
For evolution by natural selection to occur, there must be genetic variation within a population, some of which must be heritable. The environment must exert selective pressure on the individuals, favoring those with advantageous traits that increase their chances of survival and reproduction. Over time, these advantageous traits will become more common in the population due to differential reproductive success.
Generally evolution by natural selection occurs quite slowly over?
Evolution through natural selection occurs slowly over millions of years. It has been hypothesized that evolution is the result of positive mutations that occur in a community of organisms that help them survive better. Evolution is essentially descent with modification.
What did Mayr take from Darwin's work?
Mayr showed that Charles Darwin's theory of natural selection applies to the evolution of genes at the molecular level.
When did the discovery of evolution take place?
The discovery of evolution began in the 19th century with scientists like Charles Darwin and Alfred Russel Wallace proposing the theory of natural selection as a mechanism driving evolutionary change. Darwin's seminal work, "On the Origin of Species," was published in 1859 and is considered a foundational text in the field of evolution.
Natural selection need in order to take place?
Natural selection requires variation in traits within a population, differential survival and reproduction based on those traits, and inheritance of those traits from one generation to the next. These factors allow for the gradual accumulation of advantageous traits over time.
How can evolution be influenced by natural selection?
Evolution is the change in allele frequency over time in a population of organisms. Natural selection is the nonrandom survival and reproductive success of randomly varying organisms. So, if an organism is selected by having greater reproductive success than it's conspecifics this organism will leave descendents that have the traits for this success and if enough descendents start making up a greater bit of the population then genes( alleles ) will change in frequency and evolution will take place. Natural selection is also the driver of adaptive change leading to speciation.
Why is natural variation important when it comes to evolution?
Only in the sense that natural selection needs variations in organisms to select from. Evolution could take place by random processes, such as genetic drift, or geographic processes, such as gene flow, but only natural selection causes the adaptive change that results in speciation.
