Chapter 20 : Organisms and their Environment

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Across
  1. 1. Organisms that break down dead organisms to get energy.
  2. 4. A series of organisms through which energy and nutrients are transferred.
  3. 6. It is used to join DNA fragments that have complementary sticky ends
  4. 9. A community of organisms interacting with each other and their environment.
  5. 11. A group of organisms of the same species living in the same place.
  6. 12. An organism that makes its own organic food substance.
  7. 14. It is made up of the various process by which carbon, in form of carbon dioxide, is removed from and released into the environment
  8. 16. A network of interconnected food chains.
  9. 20. Allows us to compare the number of organisms present in each trophic level at a particular time
  10. 22. Consists of bacterial and human DNA
  11. 24. It is the changing of the genetic material of an organism by removing the genes from an organism, modifying them and inserting them into another organism
Down
  1. 2. An organism that eats other animals for energy.
  2. 3. A horizontal bar diagram used to show food and energy relationships among organisms.
  3. 5. It is made up of different populations of plants and animals that live and interact together in an environment
  4. 7. Is the position of an organism in an food chain, food web or ecological pyramid
  5. 8. Can cut the DNA at restriction sites, which are determined by a particular sequence of DNA
  6. 10. A state where the relative sizes of different populations remain constant.
  7. 13. Allows us to compare the total energy in each trophic level of a food chain over a certain period of time
  8. 15. An organism that gets energy by consuming other organisms.
  9. 17. Allows us to compare the mass of organisms present in each trophic level at a particular time
  10. 18. The place where an organism lives.
  11. 19. It is made up of processes by which nitrogen is constantly removed from the soil, and is eventually returned to it in the form of nitrates
  12. 21. An organism that eats plants for energy.
  13. 23. All the populations of different species living and interacting with each other in a habitat.
  14. 25. The study of how organisms interact with their environment.