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Evolution is the change in the heritable characteristics of biological populations over successive generations. It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations.
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Hace 2 días · Learn about the scientific theory of evolution, which explains how living things on Earth have their origin in other preexisting types and change through generations. Explore the major evolutionary events, the evidence for natural selection, and the diversity of life forms.
Evolution 101. An introduction to evolution: what is evolution and how does it work? The history of life: looking at the patterns – Change over time and shared ancestors; Mechanisms: the processes of evolution – Selection, mutation, migration, and more; Microevolution – Evolution within a population; Speciation – How new species arise
Hence, in genetic terms evolution consists of changes in the organism’s hereditary makeup. Evolution can be seen as a two-step process. First, hereditary variation takes place; second, selection is made of those genetic variants that will be passed on most effectively to the following generations.
Hace 1 día · Learn about the process by which human beings developed from now-extinct primates, and the fossil evidence and scientific models for this history. Explore the human lineage, the human family bush, and the human evolutionary pathways.
19 de oct. de 2023 · Learn about the theory of evolution by natural selection, a scientific explanation of how organisms change over time. Find out the history, ideas, and examples of this concept, as well as its relation to other mechanisms of evolution such as genetic drift and survival of the fittest.
