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according Darwin evolution is a very slow process .......he says that generation after generation there will be a minor change in the organisms which arises due to the environmental influences and the need of the organisms......
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoThe quick and easy answer to this is that weak, sick and inferior subjects of a species fall prey to predators or die faster than others. Genetic permutations bring different characteristics.
Read Darwins books...
Examples:
Plant variations that produce poison are not eaten by animals, the plants that produce more poison live longer than those that don't so that plants that produce more poison can reproduce more.
Elephant in Africa have been hunted for ivory, hunters take the animals with the biggest tusks. This has caused elephants with smaller tusks to reproduce more, thus the tusk size in elephants is getting smaller.
Wiki User
∙ 12y agosimply put, only the strong will survive
Wiki User
∙ 7y agoThe best answer is death.
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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.
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.
Was it absolutely necessary for natural selection to take place?
Genetic change is necessary for natural selection to take place
Natural selection need in order to take place?
Natural selection needs competition in order to take place.
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.
How long does the process of natural selection and evolution take?
Evolution is a continuous, non-cyclical process that happens as long as there is life.
Where did natural selection take place?
Everywhere where there is life.
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.
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 does natural selection mean in science terms?
It is meant to indicate the Darwinian model for evolution, as opposed to for instance the Lamarckian model. It would be true that evolution occurs and has occurred even without Darwin; but until Darwin, various explanations would have been possible for why and how it happens. Darwin first formulated the thesis that evolution is directed by differential reproductive success.
How does evolution via artificial selection differ from evolution via natural selection?
If it evolution via natural selection then it is the natural that selects what traits should be passed on, for example having leg is better land animals then organisms that have leg will survive and ones that don't will die, this is natural selection, of course this happens over a long period of time. Evolution via artificial selection is where human selects the animal, perhaps the mutation may be eliminated in the wild but we think that it is suitable for our life so we mass produce the organism with that desirable trait. Like peas, ancient peas have to explode out of their pods to spread seeds but that is not good for us but then maybe one day a mutation occured and the pea pod will not explode, then we take it and breed many of that.
What are the mechanisms of evolution?
There are several mechanisms for evolution. The first (and most important) being natural selection, which plays off random mutations. Genetic drift is also another important aspect of evolution. EDIT: It depends on what you mean by "mechanism." Mutations are thought to be the mechanism that causes the change in DNA, then natural selection and Gentic drift take over. Unfortunately, mutations do not hold up and evolution is ultimately left without a mechanism. This article on mutations gives an indepth explanation http://www.answersingenesis.org/articles/wow/are-mutations-the-engine STRAIT FROM THE BIOLOGY BOOK :)
Why does natural selection occurs too be more quickly?
A lot of natural selection occurs very slowly. It took the evolution of the dog from the wolf to take at least 14,000 years. It took singled celled life 3+billion years to evolve into multicellular life.
