1-MHSAPEnvironmental.docVIP

Name____________________________________ Date_________________ Period_____ Ch 17 Preserving Earth’s Biological Diversity 1. DDT is harmful to eagles because it: A) damages their feathers. C) causes bronchitis. E) causes them to go blind B) causes their eggs to have thin shells. D) kills the eagles prey.. 2. Ecosystem diversity is: A) variety of interactions among organisms in natural communities. B) the number of different species in a given area. C) the variety of abiotic characteristics within a given area. D) the genetic variety within all populations of a given species. E) synonymous with ecosystem services. 3. Bacteria and fungi are important to humans because they: A) help control weeds. C) provide shelter. E) provide foods and antibiotics. B) pollinate crop plants. D) deplete nutrient minerals in the soil. 4. Insects are an important biological resource because they: A) enrich the soil with nitrogen. C) are involved in the recycling of nutrients. B) help control weeds and insect pests. D) prevent soil erosion. E) produce antibiotics. 5. The corn blight of 1970 was brought under control by: A) crossing highly uniform U.S. corn varieties with genetically diverse ancestral varieties from Mexico. B) strange weather patterns resulting in a drought that killed the fungus. C) the accidental release of a genetically engineered fungus from a research lab. D) repetitive treatment with various chemical sprays. E) pollution that seemed to have a greater adverse effect on the corn blight fungus than on the corn itself. 6. The continuous, low-level extinction of species that has occurred throughout the history of life on Earth is known as: A) mass extinction. B) evolution. C) background extinction. D) human impact extinction. E) biotic pollution. 7. A species in imminent danger of extinction throughout all or most of its range is said to be: A) endemic. B) commercially extinct. C) endangered. D) threatened. E) invasive. 8. The current d