Natural selection has no 'steps'. It is a continous process of filtering. However, there are a couple of key factors in natural selection, prerequisites that have to be met for natural selection to occur:
Overproduction-many organisms are produced
Genetic Variation-some organisms have different genetic traits than others
Struggle to Survive or Survival of the Fittest-The organisms with the traits better suited for their environment live while others die off
Successful Reproduction-The living organisms produce giving their offspring better traits to survive.
This process goes on changing a whole species. It is a big part of evolution. This helps organisms become the best suited to their environment that they can.
The four stages are: Overproduction, Genetic Variation, Struggle to Survive, and Successful Reproduction
- natural selection - sexual selection - genetic drift - immigration/emagration
Adaptation does not allow for natural selection: natural selection causes adaptation.
Natural selection occurs when four conditions are met: 1. There is variation among individuals. 2. That variation is at least partially heritable. 3. That variation is linked to differential reproductive success. 4. More individuals are born than can survive and reproduce.
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
The four stages are: Overproduction, Genetic Variation, Struggle to Survive, and Successful Reproduction
Overproduction, genetic variation, selection, and adaption
Inheritance of acquired characteristics is not one of Darwin's four main ideas of natural selection. His four main ideas are variation, competition, heritability, and differential reproductive success.
See the related answer below for an answer to this question.
- natural selection - sexual selection - genetic drift - immigration/emagration
The four pieces of evidence that scientists point to as proof of natural selection are the fossil record, biogeography, homologous structures, and observable natural selection in action. These pieces of evidence all support the idea that organisms have evolved over time through the process of natural selection.
overproduction: to many offspring and 3 others
Mutation, Natural Selection, Migration, and Genetic Drift.
The question is semantically equivalent to asking 'What are the four parts of the existence of a banana?' I cannot answer it.
Its NaTuRaL sElEcTiOn if you didn't know.
Abiogenesis, or more commonly known as the origin of life itself, is not part of Darwin's theory of evolution.
Adaptation does not allow for natural selection: natural selection causes adaptation.