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Monday, 11/7/16 Objectives - SWBAT state Charles Darwin’s contribution to science - SWBAT describe the three patterns of biodiversity noted by Darwin Monday, 11/7/16 Agenda CRS Do Now What is Evolution Video/ Discussion 16.1 Stop and Jot Exit Ticket Monday, 11/7/16 Exit Ticket On a separate piece of paper, answer the following questions with complete sentences. • Who was Charles Darwin and what was his contribution to science? • What three kinds of variations among organisms did Darwin observe during the voyage of the Beagle? Tuesday, 11/8/16 Objectives • SWBAT identify the conclusions drawn by Hutton and Lyell about Earth’s history • SWBAT describe Lamarck’s hypothesis of evolution Tuesday, 11/8/16 Agenda CRS Do Now Darwin’s Voyage of Discovery (16.1) Quiz Read 16.2 Wednesday, 11/9/16 Objectives • SWBAT escribe the conditions under which natural selection occurs • SWBAT explain the principle of common descent Wednesday, 11/9/16 Agenda CRS Do Now Evolution PowerPoint Natural Selection Video Exit Ticket Notes: Evolution By Natural Selection • Natural selection occurs in any situation in which more individuals are born than can survive (the struggle for existence), there is natural heritable variation (variation and adaptation), and there is variable fitness among individuals (survival of the fittest). Natural Selection • https://www.youtube.com/watch?v=AMtT5_AQmLg Natural Selection • Natural selection is the process by which organisms with variations most suited to their local environment survive and leave more offspring. • In natural selection, the environment—not a farmer or animal breeder—influences fitness. Natural Selection- Example • This hypothetical population of grasshoppers changes over time as a result of natural selection. • Grasshoppers can lay more than 200 eggs at a time, but only a small fraction of these offspring survive to reproduce. Natural Selection- Example • Certain variations, called adaptations, increase an individual’s chances of surviving and reproducing. • In this population of grasshoppers, heritable variation includes yellow and green body color. • Green color is an adaptation: The green grasshoppers blend into their environment and so are less visible to predators. Natural Selection- Example • Because their color serves as a camouflage adaptation, green grasshoppers have higher fitness and so survive and reproduce more often than yellow grasshoppers do. Natural Selection- Example • Green grasshoppers become more common than yellow grasshoppers in this population over time because more grasshoppers are born than can survive, individuals vary in color and color is a heritable trait, and green grasshoppers have higher fitness in this particular environment Natural Selection • Natural selection does not make organisms “better.” • If local environmental conditions change, some traits that were once adaptive may no longer be useful. • If environmental conditions change faster than a species can adapt to those changes, the species may become extinct. Common Descents • Darwin proposed that, over many generations, adaptation could cause successful species to evolve into new species. • Principle of common descent suggest that, all species—living and extinct— are descended from ancient common ancestors. • For evidence of descent with modification over long periods of time, Darwin pointed to the fossil record. Wednesday, 11/9/16 Exit Ticket On a separate piece of paper answer the following question. • There are two types of worms. Worms that eat in the day time (diurnal) and worms that eat at night (nocturnal) . If most birds eat during the day time, which adaptation has a higher fitness? Explain your reasoning. Thursday, 11/10/16 Objectives SWBAT explain how geologic distribution of species relates to their evolutionary history SWBAT how the fossil record, homologous structures, and molecular evidence can be used to support the theory of evolution.