Natural selection | Definition & Processes | Britannica
2024年11月21日 · natural selection, process that results in the adaptation of an organism to its environment by means of selectively reproducing changes in its genotype, or genetic constitution. A brief treatment of natural selection follows.
Natural selection - Wikipedia
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
Natural Selection - Understanding Evolution
Natural selection is one of the basic mechanisms of evolution, along with mutation, migration, and genetic drift. Darwin’s grand idea of evolution by natural selection is relatively simple but often misunderstood. To see how it works, imagine a population of beetles: There is variation in traits.
Natural Selection - National Geographic Society
2023年10月19日 · Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.
Natural Selection - Definition and Examples - Biology Dictionary
2021年1月15日 · Natural selection is a pressure that causes groups of organisms to change over time. Animals inherit their genetics from their parents or ancestors, and the environment is constantly changing. So, no organism is perfectly adapted to its environment.
Natural Selection - Definition, Principles, Process, Types,
2023年11月10日 · Natural selection is the adaptation strategy of living organisms on Earth. It occurs when they acquire and evolve a trait with time that provides them a distinct advantage for their survival and reproduction over other organisms in the population. Darwin called them ‘survival of the fittest.’
Evolution by Natural Selection: Examples and Effects of Adaptation
2023年11月3日 · By understanding natural selection, we can learn why some plants produce cyanide, why rabbits produce so many offspring, how animals first emerged from the ocean to live on land, and how some mammals eventually went back again.
What is natural selection? - Natural History Museum
In natural selection, genetic mutations that are beneficial to an individual’s survival are passed on through reproduction. This results in a new generation of organisms that are more likely to survive to reproduce.
What is natural selection? - Inheritance and genetics - BBC
Natural selection is a process by which a species changes over time in response to changes in the environment, or competition between organisms, in order...
How Does Natural Selection Work? - American Museum of Natural History
Natural selection is a simple mechanism that causes populations of living things to change over time. In fact, it is so simple that it can be broken down into five basic steps, abbreviated here as VISTA: Variation, Inheritance, Selection, Time and Adaptation.