ECOLOGY

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Across
  1. 4. - The protection and preservation of natural resources and ecosystems.
  2. 7. - A symbiotic relationship between two organisms where both species benefit from the interaction.
  3. 8. - The process by which plants use sunlight, water, and carbon dioxide to produce oxygen and energy.
  4. 10. - A major regional group of distinctive plant and animal communities.
  5. 13. - The complete disappearance of a species from Earth.
  6. 14. - The maximum population size of a species that an ecosystem can sustain.
  7. 16. - An organism that breaks down dead or decaying matter.
  8. 20. - The introduction of harmful substances or contaminants into the environment.
  9. 22. - A non-native species that can cause harm to an ecosystem.
  10. 23. - A symbiotic relationship between two organisms where one organism benefits while the other is neither harmed nor benefited.
  11. 24. - A species at risk of becoming extinct.
  12. 25. - The region on Earth where life exists, including the atmosphere, hydrosphere, and lithosphere.
Down
  1. 1. - A series of organisms that transfer energy by consuming the next organism in the chain.
  2. 2. - A community of living organisms interacting with each other and their physical environment.
  3. 3. - The variety of plant and animal life in a particular habitat or ecosystem.
  4. 5. - An organism that can produce its own food, typically through photosynthesis.
  5. 6. - The natural environment in which a particular species lives.
  6. 9. - The ability to meet present needs without compromising the needs of future generations.
  7. 11. - The role or position a species occupies within an ecosystem.
  8. 12. - The process by which living organisms take in oxygen and release carbon dioxide.
  9. 15. - The process by which an organism or species becomes better suited to its environment.
  10. 16. - The clearing or removal of forests.
  11. 17. - An organism that obtains energy by feeding on other organisms.
  12. 18. - The gradual process by which one community of plants and animals replaces another.
  13. 19. - A system of interconnected food chains.
  14. 21. - The position an organism occupies in a food chain or food web, defined by its feeding behavior.