Across
- 2. the natural home or environment
- 4. an organism that shapes its environment
- 6. number of all the organisms in a community
- 7. the preying of one animal on others
- 11. a group of people living in the same place
- 13. an animal that is hunted and killed by another for food
- 15. a group of living organisms among the same group
- 16. physical rather than biological; not derived from living organisms
- 17. an individual animal or plant
- 18. a variable of a system that causes a noticeable change
- 19. the activity or condition of competing.
Down
- 1. the ratio between the number of live-born births
- 3. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
- 5. an animal or plant on or in which a parasite or commensal organism lives
- 8. a niche is the match of a species to a specific environmental condition
- 9. the process whereby organisms better adapted to their environment
- 10. the action or process of adapting or being adapted.
- 12. ratio between deaths and individuals
- 14. a biological community
- 20. an animal that naturally preys on