Plants: Essential to Ecosystems

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Across
  1. 2. a simple sugar
  2. 4. something that someone or something needs
  3. 7. a very small amount of matter
  4. 10. process by which a green plant uses the sun's energy to make food
  5. 11. tiny living organisms
  6. 13. having to do with veins and vessels that carry fluids throughout an organism
  7. 14. the green substance in plants
Down
  1. 1. part of plant where photosynthesis takes place
  2. 3. a substance that gives color to plants and animals
  3. 5. very important or necessary for a job to be completed
  4. 6. taking in oxygen
  5. 8. a community of organisms and their physical environment
  6. 9. absolutely necessary
  7. 12. related to one or more cells