0
Add your answer:
Earn +20 pts
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.
Evolution by natural selection works best on populatin having no variation?
Evolution by natural selection actually relies on variation within a population. Without variation, there would be no genetic differences for natural selection to act upon, leading to no evolution. Variation provides the raw material for natural selection to work with, allowing beneficial traits to be favored and passed on to future generations.
How does genetic variation support Natural Selection?
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
Is mutation an important part of the process of evolution?
Yes, mutations are crucial for the process of evolution as they introduce genetic variation into populations. This variation allows for natural selection to act upon, leading to the adaptation and evolution of species over time.
Is it possible for a population to undergo natural selection?
No, there is no genetic variation upon which natural selection can operate.
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.
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
What process provides the genetic variability that natural selection acts on during evolution?
The process that provides genetic variability for natural selection to act on during evolution is called mutation. Mutations can create new genetic variations by altering the DNA sequence. Natural selection then acts on these variations, favoring those that provide a survival or reproductive advantage in a given environment.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
Why is phenotype variation necessary for natural selection and sexual selection?
Phenotype variation is necessary for natural selection and sexual selection because it provides the raw material for evolution to act upon. Variation allows for individuals within a population to have different traits, which may offer advantages in survival, reproduction, or mate selection. Without phenotype variation, there would be no diversity for natural selection and sexual selection to operate on, thereby limiting the potential for adaptation and species diversification.
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.
What are the main principles of evolution according to Charles Darwin and the evolutionists?
The main principles of evolution according to Charles Darwin and evolutionists include natural selection, which is the process by which organisms best adapted to their environment tend to survive and reproduce, leading to the gradual change of species over time. Additionally, genetic variation and inheritance play a key role in driving evolutionary change by providing the raw material for natural selection to act upon. The idea that all species share a common ancestry and have evolved from a single common ancestor is another important principle of evolution.
Is it that traits that are controlled by genes can be acted upon by natural selection?
Yes.
