Biology Unit 7 Ecology

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Across
  1. 1. the three tyes of population dispersion are uniform, random, and ___
  2. 3. type of succession that occurs when a community forms in an area that was previously uninhabited
  3. 6. the two fossil fuels that currently support the majority of our energy use are oil and ___
  4. 9. phosphates are found in soil and ___
  5. 12. an example of a density-independent limiting factor
  6. 13. an increase in harmful algal blooms
  7. 15. the conversion of nitrates to nitrogen gas
  8. 17. an example of a pioneer species
  9. 18. - two ways humans impact the carbon cycle are burning fossils and ___
Down
  1. 1. the # of individuals the environment can support
  2. 2. the number of individuals per unit area is population __
  3. 4. consumers use oxygen and ___ and place carbon dioxide and water back into the atmosphere
  4. 5. producers remove ___ from the atmosphere to create glucose
  5. 7. an example of density-dependent limiting factor
  6. 8. a group of the same species that interbreed
  7. 10. symbiotic relationship where both species benefit
  8. 11. organisms need nitrogen to build nucleic acids and ___
  9. 14. the key element of all organic compounds
  10. 16. part of the water cycle; the moving of surface water into the soil