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5 Written questions

5 Matching questions

  1. keystone species
  2. ecozones
  3. bioaccumulation
  4. nitrogen fixation
  5. population
  1. a accumulation of a substance in various tissues of a living organism
  2. b smaller regions in ecosystems that share similar physical features
  3. c group of organisms of same species and same area
  4. d a species whose presence contributes to ecosystem's diversity and whose extinction would destroy other life forms
  5. e (nitrogen cycle step 1) conversion of atmospheric nitrogen into compounds (ammonium)

5 Multiple choice questions

  1. organisms that consume primary consumers
  2. an introduced, nonnative species
  3. organism that nourishes oxidation of inorganic chemical compounds, instead of photosynthesis
  4. # and variety of organisms in an area (ecosystem) more of it leads to better adaptability and chances of survival
  5. (nitrogen cycle step 2) bacteria in soil convert ammonium (NH4+) to nitrate or NO3.

5 True/False questions

  1. heterotrophdependent on other complex organisms for food


  2. ammonificationprocess where concentration of toxic substances increase in each successive length in food chain.


  3. nichetotal sum of species' use of resources in environment


  4. gause's principleno 2 species can occupy same niche at same time


  5. primary consumersorganisms that consume secondary consumers or other tertiary consumers


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