nutrition in plants

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Across
  1. 3. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
  2. 5. the process of taking in food by an organism and its utilization is called
  3. 6. an organism that feeds on or derives nourishment from decaying organic matter.
  4. 8. a mutually beneficial relationship between different people or groups.
Down
  1. 1. a substance that provides nourishment essential for the maintenance of life and for growth.
  2. 2. organisms that live in or on other living organisms and derive their food from them
  3. 4. he process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
  4. 7. a nitrogen-fixing bacterium that is common in the soil, especially in the root nodules of leguminous plants.