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it relies upon the population
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How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
Why are mutation and recombination important in the process of natural selection and the evolution of organisms?
When a mutation occurs in the replication process, it changes certain features, like maybe better eyesight, and maybe bigger eyes, or bigger claws, and the meaning of evolution is when something changes into a better form.
The mechanism by which evolution occurs is called?
AnswerNatural selection is the mechanism put forward by Darwin as one of the two essential mechanisms for evolution, the other being random mutation (which Darwin described as inheritable variation, not knowing about genes at the time).The modern evolutionary synthesis includes genetic mutations as the mechanism which provides variations upon which natural selection can act.
Is it true natural selection can act upon an individuals genotype the external of genes?
False
What is the smallest level on which evolution can occur?
Natural selection acts upon the individual organism, whilst evolution occurs at the population level. The environment selects for organisms best adapted for highest survival and reproductive success. Natural selection requires three key things - variation, inheritable traits, and differential survival/reproduction. Species will produce more offspring than the environment can support(carrying capacity), and the population tends to be fairly stable until resources are limited. A struggle for existence is created, and natural selection ensures that weaker traits die out while stronger traits live on. Organisms show variation in characteristics, and that variation is heritable. Survival depends on inherited traits, and unequal survival/reproduction leads to adaptation and evolution. Therefore, while the individual organism can adapt, the population is what actually evolves.
Explain the role of mutations in evolution?
Mutations are the material upon which natural selection acts. Evolution is a two sided coin. One side is mutation; the other side is natural selection. Without mutation there is no significant variation. Mutations are, however, ubiquitous. Every organism is a mutant. Evolution can be summarized as the non random survival of randomly varying replicators.
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 process provides the genetic variability that natural selection acts on during evolution?
The ultimate source of variation is mutation. However, recombination, or crossing over, can produce enormous amounts of variation by shuffling alleles into different combinations. Combined, the two processes produce the variation upon which natural selection can act, and which results in evolution.
Can natural selection act upon body shape?
Yes, that would be called the Homologous structure, and that changes in natural selection.
Is Darwin's theory proven?
A. It is no longer Darwin's theory as the theory of evolution by natural selection has been modified and added to since Darwin's day. Still, Darwin would recognize the theory as it stands today. B. Science does not " prove " things as that is a mathematical concept. Science supports it's theories with overwhelming amounts of converging evidence. That said, the theory of evolution by natural selection has been upheld scientifically for over 150 years and had withstood many tests and challenges. The theory of evolution by natural selection ios the bedrock upon which modern biology is built.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
Why are mutation and recombination important in the process of natural selection and the evolution of organisms?
When a mutation occurs in the replication process, it changes certain features, like maybe better eyesight, and maybe bigger eyes, or bigger claws, and the meaning of evolution is when something changes into a better form.
Is it that traits that are controlled by genes can be acted upon by natural selection?
Yes.
The mechanism by which evolution occurs is called?
AnswerNatural selection is the mechanism put forward by Darwin as one of the two essential mechanisms for evolution, the other being random mutation (which Darwin described as inheritable variation, not knowing about genes at the time).The modern evolutionary synthesis includes genetic mutations as the mechanism which provides variations upon which natural selection can act.
Who wrote the book 'The Selfish Gene'?
The Selfish Gene is a book on evolution by Richard Dawkins, published in 1976. It builds upon the principal theory of George C. Williams's first book Adaptation and Natural Selection.
How do mutations relate to natural selection?
Mutation, a copying error in the replication of DNA, can give rise to variation in an organisms phenotype and if this new phenotype is beneficial to survival and reproductive success ( as little as 1% ) it will be selected naturally against the immediate environment, then if this so selected organism leave many descendents with the same beneficial traits then the populations gene pool will change in allele frequency and you have evolution. ( a 19th century sentence Darwin would be proud of! )
