AP BIO FINAL

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Across
  1. 2. nutrient circuits in ecosystems
  2. 5. amount of nutrients a plant can absorb
  3. 7. provided by the sun for plants
  4. 11. organisms that get their food from outside sources
  5. 12. organisms that produce their own food
  6. 16. amount of light energy converted to chemical energy
  7. 18. total primary production
  8. 19. biological variation
  9. 20. typically omnivores, fourth level of food chain
  10. 21. nonliving organic matter
  11. 24. _________ gases reflect infrared radiation back towards Earth
  12. 25. predator at the top of the food chain, not threatened by any other animals in the food chain
  13. 26. matter cannot be created or distroyed
  14. 27. element that is necessary for energy production to increase
Down
  1. 1. _______ is taken up and released by plants through photosynthesis and respiration
  2. 3. plants, first level of food chain
  3. 4. this happens due to the accumulation of chemicals and toxins in bodies of water
  4. 6. decomposers
  5. 8. concentrates toxins at higher trophic levels where biomass is lower
  6. 9. water transpired by plants and evaporated from a landscape
  7. 10. amount of chemical energy converted to new biomass
  8. 13. overgrowth of algae
  9. 14. changes to a population over generations
  10. 15. GPP minus energy used by primary producers
  11. 17. second level of food chain
  12. 22. what is the environment called where animals interact with other living things and abiotic factors?
  13. 23. third level of food chains, carnivores