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5 Written questions

5 Matching questions

  1. Symbiosis
  2. biomass
  3. heterotroph (consumer)
  4. Natural Selection
  5. Infiltration
  1. a The slow passage of a liquid through a filtering medium.
  2. b The total mass of living matter in a given unit area
  3. c A natural process resulting in the evolution of organisms best adapted to the environment.
  4. d Organism that obtains energy from the foods it consumes.
  5. e Relationships that exist between individuals of different species, where at least one party benefits from the relationship.

5 Multiple choice questions

  1. The study of environments.
  2. A relationship between individuals of different species that benefits both organisms.
  3. They eat the primary consumers as their source of food.
  4. The conversion of nitrates into nitrogen gas.
  5. A prokaryotic (single-celled) organism that acts as a decomposer. It gets the nutrients it needs by breaking down dead organisms.

5 True/False questions

  1. commensalismA symbiotic relationship between individuals of different species in which one individual benefits and the other neither benefits nor is harmed.


  2. PopulationAll individuals of a species in a given area.


  3. leachingRemoval of dissolved materials from soil by water moving downwards


  4. Herbivores (primary consumers)They use the producer organisms to provide them with their food.


  5. runoffWater that flows over the ground surface rather than soaking into the ground


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