0
How does natural selection create a change in population over time?
Wiki User
∙ 12y ago
By favoring one variation of organism over another variation in the same population. These favored individuals ( natural selection selects individual organisms ) leave more descendants, with these traits, who over time become more numerous in the population and the populations allele frequency changes to reflect this. In a word, evolution.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Are new alleles made by natural selection?
No - natural selection does not create new alleles. Variation in alleles needs to exist in the population in order for natural selection to occur. Natural selection will involve the change in allele frequencies over time, but it does not create new alleles. New alleles are the result of mutations.
How does natural selection sometimes create a change in a populations?
Natural selection constantly causes change in populations by making them change over time, and occasionally split to form new species.For example, if a population stays together, but their environment starts to change, then natural selection will pick the fittest organisms of that population to live and pass their traits on to their offspring, causing a gradual change in the genetic makeup of the entire populationAnother example of natural selection on a population is speciation, or the formation of a new species. If the population is separated geographically, behaviorally, or temporally, the 2 sub groups can adapt to different climates and gradually become so different that they can't mate anymore, so they become 2 separate species.add Natural selection may be seen in action today. The emergence of herbicide resistant plants and insecticide resistant populations of insects are well documented.It must be said, that if the new threat (herbicide/insecticide) vanished, the population may well revert to the previous form. But if the new challenge remains significant, then it becomes dominant.
Why is phenotype variation necessary for natural selection and sexual selection?
It is necessary to create a full and varied species.
Why variations are important in human life?
Variations are the basis of evolution, but variations within a population create diversity, which is useful to slow disease and allow natural selection to occur.
How are intelligent design and natural selection alike?
They aren't. Intelligent design posits that natural selection cannot create life as we know it, and inserts a deity as the cause.
What is a process through which new species can arise?
Natural selection that leads to a great enough change in allele frequency over time in a population of organisms, evolution, and helped by environmental changes to create sub-populations of these organisms that can no longer breed among themselves and then are accounted new species.
Does natural selection operate only on an individual over many generations?
The answer below is partly right, but natural selection actually does not act on an individual. As stated below, individuals within a population of a given species are selected based on physical trains which benefit, but not for the survival of the animal itself. It is important to note that in Darwin's Theory of Natural Selection, environmental change does not create new alleles but rather select from the gene pool of a population that has the allele which would benifit in a given condition. Thus, natural selection act on a population and its gene pool rather than the individuals. Yes. According to Charles Darwin's theory of natural selection, individuals within a population of a given species are "selected" based on physical traits which benefit the survival of the animal. However, they are only "selected" thanks to the individuals that die, because they are not physically suited for survival as well as the others. Natural selection acts directly only on those to die, because it is technically the only physical "act" or determining factor that demonstrates Darwin's theory. All the rest simply has to do with the animals left over, which simply breed as usual inevitably creating better and better animals, while natural selection picks off all those that are not quite good enough.
What is the difference between selective breeding and natural selection?
In natural selection, the animals take time and evolve slowly. In selective breeding, humans can transfer genes from one organism into another organism.
What are the natural causes that create rapid or slow change on the surface of the earth?
EARTHQUAKE
How does mutation and natural selection operate together in the process of evolution?
Under natural selection, not all genes are successful, but those which are will progress to the next stage of selection. Mutations introduce new genetic information to an organism's genetic code, providing more genotypes to create more phenotypes, which can be acted on and potentially more suitable ones to be selected.
How does natural selection lead to evolution (apex)?
small changes add up over time
What type of selection can create 2 new species from one population?
There are several types of selections that can do this. It includes allopatric speciation where the population is separated by physical barrios, sympatric speciation where variations occur in the population, and allopolyploid when two species merge.
