Across
- 2. living together of two dissimilar organisms
- 5. an abundant accumulation of nutrients that supports organisms
- 9. a hardy species first to colonize
- 11. substance obtained from another substance through change
- 12. maximum number of organisms of a particular species
- 14. a natural environment of an organism
- 16. an organism requiring organic compounds for food
- 18. a complex biotic community characterized by distinct animal or plant species
- 20. inhalation and exhalation of air
- 24. a relationship between 2 species living without damage
- 25. pertaining to life
- 27. a substance that takes part in and changes during a reaction
- 29. the coming of one person or thing after another
- 30. a system of interconnected elements formed by interactions
Down
- 1. a social group with common cultural heritage
- 2. class of individuals having common characteristics
- 3. the process by which plants create food
- 4. an environmental factor that limits population
- 6. predatory behavior
- 7. a relationship between organisms where on lives as a parasite
- 8. place appropriate for a person or thing
- 10. eating both plants and animals
- 13. a form modified to fit a changed environment
- 15. an animal that feeds on dead organic matter
- 17. an animal that feeds on plants
- 19. the ecosystem compromising the entire earth
- 21. inhabitants of a place
- 22. an animal that eats flesh
- 23. an organism that forms nutrition from simple inorganic substances
- 26. a beneficial relationship between two species
- 28. the absence of life of living organisms