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
Overproduction, variation, selection, and adaptation
See the related answer below for an answer to this question.
- natural selection - sexual selection - genetic drift - immigration/emagration
Mutation, Natural Selection, Migration, and Genetic Drift.
overproduction: to many offspring and 3 others
Its NaTuRaL sElEcTiOn if you didn't know.
The question is semantically equivalent to asking 'What are the four parts of the existence of a banana?' I cannot answer it.
Abiogenesis, or more commonly known as the origin of life itself, is not part of Darwin's theory of evolution.
natural selection
Adaptation does not allow for natural selection: natural selection causes adaptation.