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Evolution - Wikipedia Evolution is the change in the heritable characteristics of biological populations over successive generations [1] [2] 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 [3]
Evolution | Definition, History, Types, Examples | Britannica Evolution, theory in biology postulating that the various types of living things on Earth have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations
Theory of Evolution - National Geographic Society The theory of evolution is a shortened form of the term “theory of evolution by natural selection,” which was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century
An introduction to evolution - Understanding Evolution 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
EVOLUTION Definition Meaning - Merriam-Webster The meaning of EVOLUTION is descent with modification from preexisting species : cumulative inherited change in a population of organisms through time leading to the appearance of new forms : the process by which new species or populations of living things develop from preexisting forms through successive generations; also : the scientific
evolution | Learn Science at Scitable - Nature Evolution is a process that results in changes in the genetic material of a population over time Evolution reflects the adaptations of organisms to their changing
What is evolution? - BBC Bitesize Evolution is the way that living things change over time The first person who explained how evolution happens was Charles Darwin with his scientific theory of natural selection
Evolution - Basic Biology The theory of evolution states that the diverse array of organisms on Earth has evolved from a single common ancestor over time Evolution works through a process known as natural selection Natural selection makes it more likely for the best-adapted individuals to survive and reproduce
An Introduction to Evolution - ThoughtCo Evolution is change over time Under this broad definition, evolution can refer to a variety of changes that occur over time—the uplifting of mountains, the wandering of riverbeds, or the creation of new species To understand the history of life on Earth though, we need to be more specific about what kinds of changes over time we're talking about