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Evolution Essential Questions Why is there such a great diversity of organisms on Earth? What are mutations and how do they lead to new species? Why do organisms live where they do? How are organisms adapted to live in the habitat that they live in? What are some of the modes of evolution? Are humans still evolving? How can we observe evolution? Day 1: Variation Required Readings: 3.24 Learning Objectives: To recall that living organisms differ from one another To distinguish between continuous and discontinuous variation Starter Why do you think there is so much variation within species? Provide some examples (at least 3) of organisms and how they vary. Time: 10 minutes Activity 1 Watch the video “The Making of the Fittest: Natural Selection and Adaptation” Complete the quiz as you watch it. Don’t worry if you don’t finish the quiz Time: 15 minutes Activity 2 Move to your lab groups Complete the Color Variation in Rock Pocket Mouse Populations packet Time: 35 minutes Activity 3 http://www.bbc.co.uk/bitesize/ks3/science/organi sms_behaviour_health/variation_classification/revis ion/1/ Read through the summary, complete the activity and the quiz Time: 20 minutes Closing & Homework Complete the quiz (due Monday) Complete the “Color Variation in Rock Pocket Mouse Population” (due Monday) Day 2 What Darwin Never Knew While watching the video, Write down questions that they have after watching the video Keep note of interesting facts/information that they learned while watching the video Hand these in at the end of the lesson Homework: What is your personal view of evolution? Give 3 points to support your claim. Why do you think evolution is such a controversial topic to learn about? Day 3: Causes of Variation Required Readings: 3.25 Learning Objectives: To identify mutation and sexual reproduction as sources of variation To understand that mutations may involve whole chromosomes or genes within them To recognize that environmental factors may increase the likelihood of mutation Starter What is a mutation? How do mutations occur? What do mutations do to an organism? Are mutations good, bad or neither? Explain. Time: 15 minutes Activity 1 Any questions on last week’s video? Time: 5 minutes Activity 2 Get into your lab groups Mutations and Variation activity Time: 45 minutes Discussion Which mutation caused the greatest delay in acquiring food? Which mutation caused the greatest delay in processing and consuming food? What would these mutations do to the population of the environment? What were some adaptations to the mutations your group came up with? In what environment would each mutation be beneficial in? Harmful? What type of animal would have these mutations? Activity 3 Beneficial vs. harmful mutations Create a cartoon showing the benefits and the harms of mutations Time: 15 minutes Day 4 (60 min) Required Readings: 3.26: Variation and NS: The Evolution of Species Learning Objectives: To understand the meaning of adaptation and to provide examples of this To realize that Darwin’s theory benefited from the ideas of other scientists Activity 1 Go to the website: http://sciencenetlinks.com/esheets/nowhere-tohide/ Play the game and answer the questions 1-9 on the first page Go to the website: www.biologycorner.com/worksheets/pepperedmot h.html Complete the simulation and answer the data and analysis section Homework Activities due Tuesday, February 26 Day 5 Required readings: 3.27: Natural Selection Learning Objectives: TO understand how adaptation leads to natural selection Activities Work in your groups to complete the following activities: Using a picture, explain how and why natural selection occurred in Darwin’s finches in the Galapagos Islands Create a powerpoint with the following: Research the following and give examples where this occurs in nature: over-production, survival of the fittest, struggle for existence, variation, passing on advantageous characteristics to offspring How are new species formed? How do selective pressures affect how a species evolves? Day 6 Required Readings: None Learning Objectives: To simulate the Darwinian theory of natural selection Observe how natural selection affects a population Learn how mutations, gene flow, genetic drift, and selective mating affect a population Understand how natural selection tends to create a population more adapted for its environment Starter Any problems from last week’s work? Show me the work you completed from the last 2 lessons Time: 15 minutes Activity 1 Get into your lab groups Read through the “Engage” section of the activity and answer the questions on the side Time: 10 minutes Activity 2 Work through the “explore” section You will do 2 generations at each of the three habitats I will tell you “start” and “stop” for each of the generations after you have your station set up Record the data when needed Time: 45 minutes Activity 3 Answer the “explain” questions with your group Time: 15 minutes Day 7 Required Readings: None Learning Objectives: To simulate the Darwinian theory of natural selection Observe how natural selection affects a population Learn how mutations, gene flow, genetic drift, and selective mating affect a population Understand how natural selection tends to create a population more adapted for its environment Activity 1 Work through the “Extend” section of the “Simulating the Darwinian Theory” lab When completed, answer the “Explain” questions with your group Hand in one copy plus your observations You may use the rest of the time to get caught up on missing work