Ecology By Hamza Hussain

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Across
  1. 3. an organism that creates its own food or energy
  2. 7. organism that breaks down dead organic material
  3. 8. a hierarchical series of organisms each dependent on the next as a source of food.
  4. 9. the variety of life in the world or in a particular habitat or ecosystem.
  5. 11. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
  6. 12. the position of an organism in the food chain
Down
  1. 1. relating to or resulting from living things
  2. 2. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding
  3. 4. a biological community of interacting organisms and their physical environment.
  4. 5. physical rather than biological; not derived from living organisms
  5. 6. a system of interlocking and interdependent food chains.
  6. 10. the gradual development of something