Evolution | Definition, History, Types, & Examples | Britannica
4 天之前 · 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. The theory of evolution is one of the fundamental keystones of modern biological theory.
Evolution - Natural Selection, Adaptation, Genetics | Britannica
4 天之前 · Biological evolution is the process of change and diversification of living things over time, and it affects all aspects of their lives—morphology (form and structure), physiology, behaviour, and ecology. Underlying these changes are changes in the hereditary materials.
Evolution - Scientific American
2024年11月28日 · Evolution is often depicted as a steady forward march from simple to complex forms. But new research shows that certain ferns can evolve ‘backward’
Theory of Evolution - Education
2023年10月19日 · Darwin and a scientific contemporary of his, Alfred Russel Wallace, proposed that evolution occurs because of a phenomenon called natural selection. In the theory of natural selection, organisms produce more offspring than are able to survive in their environment.
Evolution - Darwin, Natural Selection, Genetics | Britannica
2024年10月25日 · Darwin accumulated evidence showing that evolution had occurred, that diverse organisms share common ancestors, and that living beings have changed drastically over the course of Earth’s history. More important, however, he extended to the living world the idea of nature as a system of matter in motion governed by natural laws.
Understanding Evolution
An introduction to evolution, explaining what it is and how it works, including mechanisms like selection, mutation, migration, and speciation.
What is evolution? | Biological Principles - gatech.edu
Identify the requirements for biological evolution to occur; Distinguish biological evolution of populations from changes to individual organisms within their lifetimes; Cite evidence for evolution; Distinguish between homologous and analogous structures; Recognize common misconceptions about evolution; Life on Earth
Evolution | Learn Science at Scitable - Nature
Evolution is a process that results in changes in the genetic content of a population over time. There are two general classes of evolutionary change: microevolution and macroevolution.
Science and evolution - PMC - PubMed Central (PMC)
Hence, evolution is also the scientific theory that embodies biology, including all organisms and their characteristics. In this paper, we emphasize why evolution is the most important theory in biology. Evolution explains every biological detail, similar to how history explains many aspects of a current political situation. ...
Evolvability predicts macroevolution under fluctuating selection - Science
2024年5月9日 · We first argue that the relationship is not a simple consequence of lack of genetic variation limiting evolution under directional selection or genetic drift; then we propose an alternative hypothesis based on genetic constraints limiting evolutionary responses to rapidly fluctuating selection.
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