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.
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.
Genetic variation in itself does not 'support' natural selection: it is what natural selection acts upon.
They are the selective agent in natural selection ;)
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.