Ch 3 Biology

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Across
  1. 3. the sum of all habitable ecosystems on the earth
  2. 5. A symbiotic relationship in which two organisms share the same habitat without directly affecting each other
  3. 7. Living or derived from living things
  4. 9. The interaction between two different organisms within an ecosystem
  5. 11. An organism that breaks down dead organic material, recycling nutrients to be used by other organisms
  6. 16. pyramid A model for showing the flow of energy through the various trophic levels within an ecosystem form producers to top-level consumers
  7. 17. Small particles of dead organic material
  8. 20. The conflict that results when organisms attempt to use the same resource
  9. 22. an organism
  10. 23. The physical portion of an ecosystem preferred
  11. 24. A symbiotic relationship between two organisms that is injurious to one organisms without affecting the other organism
Down
  1. 1. An autotrophic organism, that is, one that can produce its own food from light or chemical energy
  2. 2. A measurement of the variety of life in a particular ecosystem
  3. 4. a heterotrophic organism, that is, one that can not produce its own food and must obtain energy by consuming other organisms
  4. 5. The role of an organism within its habitat
  5. 6. The set of plants and animals that are adapted for life in those parts of Earth characterized by a particular climate
  6. 8. web The nutritional relationships between populations in an ecosystem involving overlapping food chains
  7. 10. a group of organisms of the same species living and interacting within the same geographic area
  8. 12. A symbiotic relationship between two organisms in which one organism benefits at the expense of the other organism, known as the host
  9. 13. Nonliving; not derived from living things
  10. 14. The community of organisms in a particular area along with the physical characteristics of their environment
  11. 15. zonation Changes in the plant and animal communities within a biome due to changes in elevation that produce differences in light, precipitation and temperature
  12. 18. The study of interrelationships between living things and their physical environment
  13. 19. A symbiotic relationship between two organisms that benefits both organisms involved
  14. 21. A symbiotic relationship between two organisms without helping or harming the other organism