Biology Chapter 3
Across
- 4. study of interrelationships between organisms and their relation to their physical surroundings
- 7. sum of all habitable ecosystems on the earth
- 9. measurement of the variety of life in a particular ecosystem
- 10. symbiotic relationship in which two organisms share the same habitat without directly affecting the other
- 12. living or derived from living things
- 13. small particle of dead organic material
- 15. symbiotic relationship between two organisms in which one benefits at the expense of the other
- 18. organism that breaks down dead organic material, recycling nutrients to be used by other organisms
- 19. group of organisms of the same species living and interacting within the same geographic area
- 20. role of an organism within its habitat
- 21. interaction between two different organisms within an ecosystem
Down
- 1. nutritional relationships between populations in an ecosystem involving overlapping food chains
- 2. conflict that results when organism attempt to use the same resources
- 3. community of organisms in a particular area along with the physical characteristics of their environment
- 5. set of plants and animals that are adapted for life in those parts of Earth characterized by a particular climate
- 6. symbiotic relationship between two organisms that is injurious to one without affecting the other
- 8. changes in the plant and animal communities within a biome due to changes in elevation that produce differences in light, precipitation, and temperature
- 11. heterotrophic organism, one that can not produce its own food and must obtain energy by consuming other organisms
- 14. symbiotic relationship between two organisms that benefits one without helping or harming the other
- 15. autotroph organism, one that can produce its own food from light or chemical energy
- 16. nonliving
- 17. symbiotic relationship between two organisms that benefits both organisms