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Natural Selection is driven by random mutations and sexual reproduction. Organisms produce more offspring than can survive. These offspring compete for resources for food and water and who can aviod stuff such as predators and disease. Sexual Reproduction allows a population to have variation. If all of a population was the same, then it could easily die out if it had a adaptation that decreased its chance of survival. With sexual reproduction, all of a population has some sort of variation. Random Mutations allow organisms to gain new adaptions to help them survive in their environment. Together, Random mutations and sexual reproduction allow organisms that can survive in their environment survive and pass on their genes to their offspring.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoNatural selection refers to survival of the fittest. The strong will survive and the weak will die out from inadequate adaptive skills or be killed by the stronger members of the species. This usually occurs over many generations, but in some instances, it can happen more quickly.
Wiki User
∙ 9y agoNatural selection acts on the way organisms interact with one another and with their environment - on their phenotypes. And through this, it acts on the frequencies of occurrence in the gene pool of the genes producing these phenotypes.
Natural selection acts on all organisms of all species.
Wiki User
∙ 15y agoIt acts on populations.
Wiki User
∙ 12y agoPhenotype to genes in the genotype.
Wiki User
∙ 11y agonatural selection act on phenotype
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Is it true natural selection can act upon an individuals genotype the external of genes?
False
How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
What relies upon evolution by natural selection?
it relies upon the population
Is inheritance a requirement for natural selection?
Yes it does. Without variance in the organisms genome, that gives variance to the phenotype, there would be nothing for natural selection to select from.
Will natural selection act on tongue rolling in a human population?
No because theres no selective advantage
Can natural selection act upon body shape?
Yes, that would be called the Homologous structure, and that changes in natural selection.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
Natural selection can only act upon a certain trait if the trait is?
heritable
Is it true natural selection can act upon an individuals genotype the external of genes?
False
Why is crossing-over one of the factors that makes natural selection possible?
Crossing-over increases the genetic variation within a population, which is required for natural selection to act upon.
How does genetic recombination influence how species change over time?
The genetic variation introduced during recombination provides new allelic combinations for natural selection to act upon.
How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
Is it possible for a population to undergo natural selection?
No, there is no genetic variation upon which natural selection can operate.
What relies upon evolution by natural selection?
it relies upon the population
Does natural selection act on the phenotype?
yes
Why does the environment act on natural selection?
I know of no government that acts, in any direct or significant way, on natural selection.
Can natural selection act upon sperm cells?
From the papers I am reading there may be mechanisms to insure only top quality sperm make it into the ejaculate.
