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Biodiversity

Biodiversity plays a crucial role in maintaining the stability of ecosystems and contributes to the overall health of the biosphere. It has direct and indirect value to humans, with economic, aesthetic, and scientific benefits. This article explores why preserving biodiversity is important for the human food supply and medical advancements. Additionally, it mentions a biodiversity extra credit project that encourages students to research ways to promote biodiversity in specific ecosystems.

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Biodiversity

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  1. Biodiversity • The variety of life in an area that is determined by the number of different species in that area • Increases the stability of an ecosystem and contributes to the health of the biosphere

  2. Why is it important? • Biodiversity maintains a healthy biosphere and provides direct and indirect value to humans • There are economic, aesthetic, and scientific reasons for preserving biodiversity

  3. Critical Thinking Question • Why is preserving biodiversity important for the human food supply?

  4. 80% of human food supply comes from 20 kinds of plants. But humans use 40,000 species for food, clothing and shelter. Biodiversity provides for variety of foods for the planet.

  5. Another question • Why is it important to maintain biodiversity for medical reasons?

  6. Drugs developed from an extract from Madagascar periwinkle is used to treat childhood forms of leukemia

  7. Promoting Biodiversity

  8. Biodiversity Extra Credit Project • Can replace any 4th marking period grade (Lab Report, Evolution Packet, Labs, Quizzes, etc) • Research one way to promote biodiversity in a particular ecosystem, and give a 2 minute presentation to the class in either the form of a poster, PowerPoint, or essay. You may quote sources, but you MUST reference them! • Project presentations will be given on Thursday, June 9th

  9. Do Now: • Work on the Final Exam Review Packet. This is not an assignment grade, but it will help you do well on the final exam (worth 10% of your grade!!!) • Use your notes, your textbook, and work with each other!

  10. Pay special attention to the following questions in the review packet: • 1, 3, 4, 7, 9, 11, 15, 19, 24, 25, 26, 34, 36, 37, 39, 40, 42, 49, 53, 54, 55, 56, 61, 62, 63, 64, 65.

  11. Review Question #1 • How would the biodiversity of an ecosystem become affected if 25% of the herbivores die off?

  12. Review Question #2 • 2 spotted cheetahs produce a litter of 4 cubs. 2 cubs are spotted, and 2 are solid black. Which fur type is dominant, and which is recessive?

  13. Review Question #3 • materials and energy can transfer from one organism to another through the food chain.

  14. Review Question #4 Comparisons of DNA sequences showed that the DNA of modern caecilians and salamanders are most similar to each other.

  15. Review Question #5 Types of Natural Selection: • Directional- ex: Pepper moth • Direction selection is when gene variation shift in a particular direction in response to a change in the environment

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