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Middle School Life Science: Environmental Problems - Biodiversity and Extinction
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Avg score: 39% Most missed: “How many living species have scientists identified?”
The biodiversity of an area is literally the number of species, both plant and animal, inhabiting the environment being examined. The species that are unable to adapt to environmental changes become extinct. This reduces biodiversity. Biodiversity has direct economic benefits to people.     - Besides food, living things provide us with many different products, such as fibers, paper, and timber.     - Living things are an invaluable source of medical drugs.     - Amphibian species may warn us of toxins in the environment.     - Wild organisms maintain a valuable pool of genetic... Show more
Middle School Life Science: Environmental Problems - Biodiversity and Extinction
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7 Questions

1. How many living species have scientists identified?
2. Economic benefits of biodiversity include
3. How do microorganisms benefit ecosystems?
4. The fifth mass extinction
5. Which of the following is an example of an exotic species in North America?
6. Which of the following types of ecosystems has the greatest biodiversity?
7. Biodiversity refers to