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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.
23 de abr. de 2024 · Evolution is the process of descent with modification that explains the origin and diversity of living things on Earth. Learn about the evidence, history, types, and examples of evolution from Britannica's experts.
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.
23 de abr. de 2024 · 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 family tree.
19 de oct. de 2023 · Learn how evolution is a scientific theory that explains how organisms change over time through natural selection and other mechanisms. Explore the history, evidence, and examples of evolution with this encyclopedic entry.
Evolution is the flagship journal of the Society for the Study of Evolution, publishing articles on evolutionary phenomena and processes at all levels of biological organisation. Find out more about the latest issue, editorial board, virtual issues, events, awards, and submission guidelines.
