index - unit 9-dean

Match the words in column A with its definition in column B Match A B here 1. a complex set of relationships among the living resources, habitats, and residents of an area. It includes vegetation plants, trees, animals, fish, birds, etc. 2. chemicals used to kill insects pollutants 3. not related to animals, plants or trees fertilizers 4. plants in general inorganic 5. manures or substances that support plant growth ecosystem 6. things that make the air, water and soil unclean or pesticides contaminated