GENETICS

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Across
  1. 4. When organisms fight over a resource that they both need.
  2. 5. When an organism no longer exists.
  3. 6. When a type of organism is in danger of ceasing to exist.
Down
  1. 1. The features that somebody has to help it survive in a place.
  2. 2. Differences between the characteristics of organisms.
  3. 3. The range of different species of organisms in an area.
  4. 5. All the physical environmental factors and all the organisms found in the area.