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1. www.khanacademy.org › science › biologyEvidence for evolution (article) | Khan Academy

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   Biologists sometimes define two types of evolution based on scale: Macroevolution, which refers to large-scale changes that occur over extended time periods, such as the formation of new species and groups. Microevolution, which refers to small-scale changes that affect just one or a few genes and happen in populations over shorter timescales.

2. evolution.berkeley.edu › evolution-101 › an-introduction-to-An introduction to evolution - Understanding Evolution

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   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

3. www.khanacademy.org › science › ms-biologyEvolution (article) | Khan Academy

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   Key points. Evolution is the change in inherited traits that occurs in a group of organisms over multiple generations. Inherited traits are those that are passed from parents to offspring via genes. Evolution is made possible by genetic variation, or gene differences, in a population.

4. www.smithsonianmag.com › science-nature › essential-timeline-understandingAn Evolutionary Timeline of Homo Sapiens - Smithsonian Magazine

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   Feb 2, 2021 · Science | February 2, 2021. An Evolutionary Timeline of Homo Sapiens. Scientists share the findings that helped them pinpoint key moments in the rise of our species.

5. www.khanacademy.org › natural-selection-ap › aDarwin, evolution, & natural selection (article) | Khan Academy

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   heritable. In this article, we'll take a closer look at Darwin's ideas. We'll trace how they emerged from his worldwide travels on the ship HMS Beagle, and we'll also walk through an example of how evolution by natural selection can work. Early ideas about evolution. Influences on Darwin. 1. Darwin and the voyage of the Beagle.

6. bio.libretexts.org › Courses › Evergreen_Valley_College4.2: Evolution - Biology LibreTexts

   bio.libretexts.org › Courses › Evergreen_Valley_College

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   Aug 15, 2023 · Introduction to Ecology (Kappus) 4: Natural Selection and Evolution. Expand/collapse global location. 4.2: Evolution. Page ID. Table of contents. Evolution. Definition: Evolution. Natural Selection. Definition: Adaptation. Stabilizing Selection. Directional Selection. Disruptive Selection.

7. www.britannica.com › science › human-evolutionHuman evolution | History, Stages, Timeline, Tree, Chart, & Facts

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   Apr 23, 2024 · Apr. 16, 2024, 8:44 AM ET (Newsweek) 'Bizarre' Finding Changes the Way We Think About Human Evolution. Top Questions. What is a human being? When did humans evolve? Did humans evolve from apes? Are Neanderthals classified as humans? Summarize This Article.