Across
- 2. An environment that provides the things the organism needs to live, grow, and reproduce
- 3. density The number of individuals in an area of a specific size
- 7. The organism that benefits
- 10. The first species to populate the area
- 12. An interaction in which one organism kills another for food
- 14. The study of how living things interact with each other and with their environment
- 18. The series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist
- 22. The number of individuals in an area of a specific size
- 26. Approximate of a number, based on reasonable assumptions
- 27. The largest population that an area can support
- 29. Non-living things of a habitat
- 31. All the different populations that live together in an area
- 32. The behaviors and physical characteristics that allow organisms to live successfully in their environment
- 33. a living thing
Down
- 1. The number of births in a population in a certain amount of time
- 4. moving into a population
- 5. The number of details in a population in a certain about of time
- 6. Involves one organism living on or inside another organism and harming it
- 8. A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce
- 9. A close relationship between two species that benefits at least one of the species
- 10. succession The series of changes that occur in an area where no soil or organisms exist
- 11. The struggle between organisms to survive as they attempt to use the same limited source
- 13. The role of an organisms in its habitat, or how it makes its living
- 15. The organisms that does the killing
- 16. The organism it lives on or in
- 17. living parts of a habitat
- 19. A characteristic that makes an individual better suited to its environment may eventually become common in that species through his process
- 20. A relationship in which one species benefits and the other species is neither helped nor harmed
- 21. The series of predictable changes that occur in a community over time
- 22. Plants and algae need water, along with sunlight and carbon dioxide, to make their own food
- 23. The organism that is killed
- 24. an environment factor that causes a population to decrease
- 25. The community of organisms that live in a particular area, along with their nonliving surroundings
- 28. leaving a population
- 30. A relationship in which both species benefit