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Published bySamson Moore Modified over 9 years ago
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Homework Should have already completed: Chapter 10 – Agriculture, Biotechnology and the Future of Food. Read pages 252 – 257 For next class, Read pages 257 (starting at Seed Banks to 261 stopping at Genetically Modified Food. Project due tomorrow, ideally in class but the latest is 5:00 EST
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New material – Chapter 10 What happens when invasive species are introduced
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New material – Chapter 10 What are genetically modified crops? Give an example and why are they feared?
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What are Biofuels? Biofuels = are derived from organic materials – Replace petroleum in engines Ethanol = a biofuel derived from corn – 2007 subsidies doubled production Food prices increased – Farmers sold corn for ethanol, not food – Farmers planted biofuels, not food crops – Riots erupted in many nations
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Preserving crop diversity Preserving native variants protects against crop failure Monocultures are vulnerable – Wild relatives contain genes that can provide resistance to disease and pests – But Mexico has lifted its ban on transgenic corn We have lost a great deal of genetic diversity in crops – U.S. crops have decreased 90% in diversity Market forces discourage diversity in food’s appearance – Food producers prefer uniform, standardized food
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New material – Chapter 10 Explain the purpose of the “Doomsday Seed Vault?” Is it truly necessary? Explain
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Seed banks are living museums Seed banks = institutions that preserve seed types as living museums of genetic diversity – Seeds are collected, stored, and periodically planted The “doomsday seed vault” in Norway stores millions of seeds from around the world
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New material – Chapter 10 Pesticides versus Biocontrols Sea otters and their role Kudzu and Cane Toads IPM (integrated Pest Management)
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Reminder of Tuesday Remember we are meeting in the computer lab on Friday to work our the research project
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