Biology Crossword

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Across
  1. 2. A biological community of interacting organisms and their physical environment
  2. 4. A closed, controlled system used for simulating an ecosystem
  3. 7. An organism that consumes a single/few foods
  4. 8. A gas that is cycled through the environment, usually involved with proteins, amino acids and other nutrients, especially with plants and bacteria
Down
  1. 1. An organism that consumes a variety of foods
  2. 3. The regions of the surface and atmosphere of a planet(usually earth) occupied by living organisms
  3. 5. A gas that is cycled through the environment, usually involved with photosynthesis
  4. 6. A role taken by a particular type of organism within its community or ecosystem