Biology

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Across
  1. 2. relationship in which two species live closely together
  2. 4. the area where an organism lives, including the biotic and abiotic factors that affect it
  3. 5. single species that is not usually abundant in a community yet exerts strong control on the structure of a community
  4. 7. symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
  5. 9. material formed from decaying leaves and other organic matter
  6. 15. day-to-day conditions of the atmosphere, including temperature, precipitation, and other factors
  7. 16. series of gradual changes that occur in a community following a disturbance
  8. 17. microscopic organisms that live in aquatic environments; includes both phytoplankton and zooplankton
  9. 18. first species to populate an area during succession
  10. 19. average year-to-year conditions of temperature and precipitation in an area over a long period of time
  11. 20. kind of wetland formed where a river meets the ocean
  12. 22. the process in which certain gases (carbon dioxide, methane, and water vapor) trap sunlight energy in Earth's atmosphere as heat
  13. 23. dark layer of the oceans below the photic zone where sunlight does not penetrate
  14. 24. layer in a rain forest found underneath the canopy formed by shorter trees and vines
  15. 27. sunlight region near the surface of water
  16. 29. dense covering formed by the leafy tops of tall rain forest trees
  17. 30. organisms that live attached to or near the bottom of lakes, streams, or oceans
  18. 32. An interaction in which one organism captures and feeds on another organism
Down
  1. 1. symbiotic relationship in which one organism benefits at the expense of another organism
  2. 3. ability of an organism to survive and reproduce under circumstances that differ from their optimal conditions
  3. 4. interaction in which one animal (the herbivore) feeds on producers (such as plants)
  4. 6. biome with long cold winters and a few months of warm weather; dominated by coniferous evergreens; also called boreal forest
  5. 8. symbiotic relationship in which both species benefit from the relationship
  6. 10. environmental conditions within a small area that differs significantly from the climate of the surrounding area
  7. 11. principle that states that no two species can occupy the same niche in the same habitat at the same time
  8. 12. succession that occurs in an area in which no trace of a previous community is present
  9. 13. term used to refer to a type of tree that sheds its leaves during a particular season each year
  10. 14. layer of permanantly frozen subsoil found in the tundra
  11. 21. any necessity of life, such as water, nutrients, light, food, or space
  12. 25. Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
  13. 26. type of succession that occurs in an area that was only partially destroyed by disturbances
  14. 28. term used to refer to trees that produce seed-bearing cones and have thin leaves shaped like needles
  15. 31. ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year