{"id":1561,"date":"2017-01-24T22:53:46","date_gmt":"2017-01-24T22:53:46","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/wm-biology2\/?post_type=chapter&#038;p=1561"},"modified":"2024-04-25T17:58:00","modified_gmt":"2024-04-25T17:58:00","slug":"introduction-to-the-evolution-of-populations","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/wm-biology2\/chapter\/introduction-to-the-evolution-of-populations\/","title":{"raw":"Introduction to the Evolution of Populations","rendered":"Introduction to the Evolution of Populations"},"content":{"raw":"<h2>Discuss the ways populations evolve<\/h2>\r\nAll life on Earth is related. Evolutionary theory states that humans, beetles, plants, and bacteria all share a common ancestor, but that millions of years of evolution have shaped each of these organisms into the forms seen today. Scientists consider evolution a key concept to understanding life. Natural selection is one of the most dominant evolutionary forces. Natural selection acts to promote traits and behaviors that increase an organism\u2019s chances of survival and reproduction, while eliminating those traits and behaviors that are to the organism\u2019s detriment. But natural selection can only, as its name implies, select\u2014it cannot create. The introduction of novel traits and behaviors falls on the shoulders of another evolutionary force\u2014mutation. Mutation and other sources of variation among individuals, as well as the evolutionary forces that act upon them, alter populations and species. This combination of processes has led to the world of life we see today.\r\n\r\n[caption id=\"\" align=\"aligncenter\" width=\"651\"]<img id=\"1\" class=\"\" src=\"https:\/\/openstax.org\/resources\/fcb81741a4b2919136c678a03712d9957ae8a6b5\" alt=\" This photo collage shows a wolf, a cucumber-shaped protozoan, a sea sponge, a slime mold, lichen, the shore of a lake with algae and trees, a spiny lion fish, a mushroom, a sequoia, and a bumblebee drinking nectar from a flower.\" width=\"651\" height=\"281\" data-media-type=\"image\/jpg\" \/> Figure 1. Living things may be single-celled or complex, multicellular organisms. They may be plants, animals, fungi, bacteria, or archaea. This diversity results from evolution. (credit \"wolf\": modification of work by Gary Kramer; credit \"coral\": modification of work by William Harrigan, NOAA; credit \"river\": modification of work by Vojt\u011bch Dost\u00e1l; credit \"fish\" modification of work by Christian Mehlf\u00fchrer; credit \"mushroom\": modification of work by Cory Zanker; credit \"tree\": modification of work by Joseph Kranak; credit \"bee\": modification of work by Cory Zanker)[\/caption]\r\n\r\n<div id=\"post-1535\" class=\"type-1 post-1535 chapter type-chapter status-publish hentry\">\r\n<div class=\"entry-content\">\r\n<h2>What You\u2019ll Learn to Do<\/h2>\r\n<ul>\r\n \t<li>Describe how population genetics is used in the study of the evolution of populations<\/li>\r\n \t<li>Define the Hardy-Weinberg principle and discuss its importance<\/li>\r\n \t<li>Describe the different types of variation in a population<\/li>\r\n \t<li>Explain the different ways natural selection can shape populations<\/li>\r\n<\/ul>\r\n<h3>Learning Activities<\/h3>\r\nThe learning activities for this section include the following:\r\n<ul>\r\n \t<li>Population Genetics<\/li>\r\n \t<li>Hardy-Weinberg Principle of Equilibrium<\/li>\r\n \t<li>Genetic Variation and Drift<\/li>\r\n \t<li>Adaptive Evolution<\/li>\r\n \t<li>Self Check:\u00a0The Evolution of Populations<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>","rendered":"<h2>Discuss the ways populations evolve<\/h2>\n<p>All life on Earth is related. Evolutionary theory states that humans, beetles, plants, and bacteria all share a common ancestor, but that millions of years of evolution have shaped each of these organisms into the forms seen today. Scientists consider evolution a key concept to understanding life. Natural selection is one of the most dominant evolutionary forces. Natural selection acts to promote traits and behaviors that increase an organism\u2019s chances of survival and reproduction, while eliminating those traits and behaviors that are to the organism\u2019s detriment. But natural selection can only, as its name implies, select\u2014it cannot create. The introduction of novel traits and behaviors falls on the shoulders of another evolutionary force\u2014mutation. Mutation and other sources of variation among individuals, as well as the evolutionary forces that act upon them, alter populations and species. This combination of processes has led to the world of life we see today.<\/p>\n<div style=\"width: 661px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" id=\"1\" class=\"\" src=\"https:\/\/openstax.org\/resources\/fcb81741a4b2919136c678a03712d9957ae8a6b5\" alt=\"This photo collage shows a wolf, a cucumber-shaped protozoan, a sea sponge, a slime mold, lichen, the shore of a lake with algae and trees, a spiny lion fish, a mushroom, a sequoia, and a bumblebee drinking nectar from a flower.\" width=\"651\" height=\"281\" data-media-type=\"image\/jpg\" \/><\/p>\n<p class=\"wp-caption-text\">Figure 1. Living things may be single-celled or complex, multicellular organisms. They may be plants, animals, fungi, bacteria, or archaea. This diversity results from evolution. (credit &#8220;wolf&#8221;: modification of work by Gary Kramer; credit &#8220;coral&#8221;: modification of work by William Harrigan, NOAA; credit &#8220;river&#8221;: modification of work by Vojt\u011bch Dost\u00e1l; credit &#8220;fish&#8221; modification of work by Christian Mehlf\u00fchrer; credit &#8220;mushroom&#8221;: modification of work by Cory Zanker; credit &#8220;tree&#8221;: modification of work by Joseph Kranak; credit &#8220;bee&#8221;: modification of work by Cory Zanker)<\/p>\n<\/div>\n<div id=\"post-1535\" class=\"type-1 post-1535 chapter type-chapter status-publish hentry\">\n<div class=\"entry-content\">\n<h2>What You\u2019ll Learn to Do<\/h2>\n<ul>\n<li>Describe how population genetics is used in the study of the evolution of populations<\/li>\n<li>Define the Hardy-Weinberg principle and discuss its importance<\/li>\n<li>Describe the different types of variation in a population<\/li>\n<li>Explain the different ways natural selection can shape populations<\/li>\n<\/ul>\n<h3>Learning Activities<\/h3>\n<p>The learning activities for this section include the following:<\/p>\n<ul>\n<li>Population Genetics<\/li>\n<li>Hardy-Weinberg Principle of Equilibrium<\/li>\n<li>Genetic Variation and Drift<\/li>\n<li>Adaptive Evolution<\/li>\n<li>Self Check:\u00a0The Evolution of Populations<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-1561\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Original<\/div><ul class=\"citation-list\"><li>Introduction to the Evolution of Populations. <strong>Authored by<\/strong>: Shelli Carter and Lumen Learning. <strong>Provided by<\/strong>: Lumen Learning. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><\/ul><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Biology 2e. <strong>Provided by<\/strong>: OpenStax. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"http:\/\/cnx.org\/contents\/185cbf87-c72e-48f5-b51e-f14f21b5eabd@10.8\">http:\/\/cnx.org\/contents\/185cbf87-c72e-48f5-b51e-f14f21b5eabd@10.8<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em>. <strong>License Terms<\/strong>: Access for free at https:\/\/openstax.org\/books\/biology-2e\/pages\/1-introduction<\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/section>","protected":false},"author":17,"menu_order":12,"template":"","meta":{"_candela_citation":"[{\"type\":\"original\",\"description\":\"Introduction to the Evolution of Populations\",\"author\":\"Shelli Carter and Lumen 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