Organisms and Their Relationships

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Across
  1. 2. heterotrophs that decomposes organic material and returns the nutrients to soil, air, and water making the nutrients available for to other organisms.
  2. 3. act of one organism feeding on another organism
  3. 6. cycle exchange of matter through the biosphere involving living organisms, chemical processes, and geological processes
  4. 10. heterotrophs that eat both plants and animals
  5. 13. organisms that cannot make its own food and gets its nutrients and energy requirements by feeding on other organisms.
  6. 14. heterotroph that eats only plants.
  7. 18. factors any living factor in an organism's environment
  8. 19. A symbiotic relationship in which both organisms benefit
  9. 24. large group of ecosystems that share the same climate and have similar types of communities.
  10. 25. fixation process in which nitrogen gas is captured
  11. 28. symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
  12. 29. symbiotic relationship in which one organism benefits at the expense of another organism
  13. 30. factors any nonliving factor in an organism's environment, such as soil, water temperature, and light availability
  14. 31. community all the interacting populations of different species that live in the same geographic location at the same time.
Down
  1. 1. heterotrophs that prey on other heterotrophs
  2. 4. total mass of living matter at each trophic level
  3. 5. anything that takes up space and has mass
  4. 7. web model that shows many interconnected food chains and pathways in which energy and matter flow through an ecosystem
  5. 8. chain simplified model that shows a single path for energy flow through an ecosystem
  6. 9. The portion of Earth that supports life
  7. 11. chemical substance that living organisms obtain from the environment to carry out life processes and sustain life
  8. 12. level Each step in a food chain or food web.
  9. 15. factor biotic or abiotic factor that restricts the number, distribution, or reproduction of a population within a community
  10. 16. role, or position, of an organism in its environment
  11. 17. biological community and all the nonliving factors that affect it
  12. 20. Physical area in which an organism lives.
  13. 21. scientific study of all the interrelationships between organisms and their environment
  14. 22. close mutualistic, parasitic, or commensal association between two or more species that live together
  15. 23. group of organisms of the same species that occupy the same geographic place at the same time
  16. 26. organism's ability to survive biotic and abiotic factors within its environment
  17. 27. process in which fixed nitrogen compounds are converted back into nitrogen gas and returned to the atmosphere
  18. 30. organism that captures energy from sunlight or inorganic substances to produces its own food.