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Ecology: Organisms and Their Relationships

Explore the flow of energy in an ecosystem, cycling of matter, and vocabulary through actual test questions. Learn about ecology, populations, ecosystems, food webs, and more.

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Ecology: Organisms and Their Relationships

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  1. Organisms and Their Relationships Flow of Energy in an Ecosystem Cycling of Matter Vocabulary Actual Test Questions 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

  2. The scientific discipline in which the relationships among living organisms and the interaction the organisms have with their environments are studied

  3. Ecology

  4. The portion of Earth that supports life

  5. Biosphere

  6. The living factors in an organism’s environment

  7. Biotic

  8. Individual organisms of a single species that share the same geographic location at the same time

  9. Population

  10. A biological community and all of the abiotic factors that affect it

  11. Ecosystem

  12. An organism that gets its energy requirements by consuming other organisms

  13. Heterotroph

  14. A heterotroph that eats only plants

  15. Herbivore

  16. An organism that eats fragments of dead matter in an ecosystem, return nutrients to the soil, air and water where nutrients can be reused by organisms

  17. Detritivore

  18. A model representing the many interconnected food chains

  19. Food Web

  20. A diagram that can show the relative amounts of energy, biomass, or numbers of organisms at each trophic level in an ecosystem

  21. Ecological Pyramid

  22. Anything that has mass or takes up space

  23. Matter

  24. The process of capture and conversion of nitrogen into a form that is useable by plants

  25. Nitrogen Fixation

  26. The name of the cycle that affects climate change

  27. Carbon and Oxygen

  28. A chemical substance that an organism must obtain from its environment to sustain life and undergo life processes

  29. Nutrient

  30. The process of converting fixed nitrogen compounds back into nitrogen gas, which returns it to the atmosphere

  31. Denitrification

  32. Organisms that eat both plants and animals

  33. Omnivores

  34. A symbiotic relationship in which one organism benefits at the expense of another organism

  35. Parasitism

  36. Each step in a food chain or a food web

  37. Trophic Level

  38. The act of one organism consuming another organism for food

  39. Predation

  40. A group of interacting populations that occupy the same geographic area at the same time

  41. Biological Community

  42. Organisms with overlapping niches probably have which type of relationship?A. commensalB. competitiveC. mutualisticD. parasitic

  43. B. competitive

  44. Which organisms perform cellular respiration?A. PlantsB. AnimalsC. Neither Plants nor AnimalsD. Both Plants and Animals

  45. D. Both Plants and Animals

  46. To explain and show how the amount of living material at each trophic level of a food chain changes, you could use a pyramid of __________________

  47. Biomass

  48. Cougars and predators that often eat weakened or diseased animals. This is a description of the ___________ of cougars. A. habitatB. communityC. NicheD. none of these

  49. C. Niche

  50. How long are food chains?A. four steps longB. three steps longC. it varies with day lengthD. it varies with ecosystem

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