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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.
Teach your students about natural selection: Clipbirds, a classroom activity for grades 6-12. Breeding bunnies, a classroom activity for grades 9-12. Find additional lessons, activities, videos, and articles that focus on natural selection.
Natural selection, also known as “survival of the fittest,” is the more prolific reproduction of individuals with favorable traits that survive environmental change because of those traits. This leads to evolutionary change, the trait becoming predominant within a population.
Principles of Natural Selection. Natural selection is the mechanism through which species evolve by favoring traits that enhance survival and reproduction within specific environments. It is environment-dependent, meaning that the traits beneficial in one setting may not be advantageous in another. Natural selection relies on variations that ...
Natural selection is how organisms adapt to their environment to increase their chances of survival in the changing climate. In contrast, artificial selection is the selective breeding imposed by humans to increase the frequency of the desired traits.
For Darwin, natural selection is a drawn-out, complex process involving multiple interconnected causes. Natural selection requires variation in a population of organisms. For the process to work, at least some of that variation must be heritable and passed on to organisms’ descendants in some way.
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.
24 Charles Darwin and Natural Selection. In the mid-nineteenth century, two naturalists, Charles Darwin and Alfred Russel Wallace, independently conceived and described the actual mechanism for evolution. Importantly, each naturalist spent time exploring the natural world on expeditions to the tropics.
Darwin’s five principles of natural selection driving evolution are variation, inheritance, selection, adaptation, and time. According to Darwin, the essential evidence for natural selection is “slight successive changes” that give rise to “innumerable” transitional links between all life forms.
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. For full treatment, see evolution: The concept of natural selection.