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5 Written questions

5 Matching questions

  1. secondary consumers
  2. biodiversity
  3. ecological succession
  4. nitrogen fixation
  5. bioaccumulation
  1. a organisms that consume primary consumers
  2. b (nitrogen cycle step 1) conversion of atmospheric nitrogen into compounds (ammonium)
  3. c accumulation of a substance in various tissues of a living organism
  4. d transition in species composition of a biological community, usually by a disturbance in community.
  5. e # and variety of organisms in an area (ecosystem) more of it leads to better adaptability and chances of survival

5 Multiple choice questions

  1. relationship where 1 is helped, and 1 is harmed
  2. dependent on other complex organisms for food
  3. when a species settles for a smaller niche after battling against another species
  4. organisms that consume producers (plants and algae)
  5. where animals and plants breathe and give off CO2 from cellular metabolism

5 True/False questions

  1. invasive speciesa species whose presence contributes to ecosystem's diversity and whose extinction would destroy other life forms


  2. denitrificationnitrogen cycle step 4) specialized bacteria convert ammonia to NO3, NO2, AND N2 and releases back to atmosphere


  3. ammonification(nitrogen cycle step 2) bacteria in soil convert ammonium (NH4+) to nitrate or NO3.


  4. combustionburning


  5. mutualismrelationship where 1 is helped, and 1 is harmed