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4 Written Questions

3 Multiple Choice Questions

  1. The struggle among organisms for the limited resources in an ecosystem is called
  2. A relationship in which one organism benefits and the other is neither helped nor harmed is called
  3. The relationship between humans and Escherichia coli bacteria in their intestines is an example of

3 True/False Questions

  1. samplingCounting the number of organisms in a small area and multiplying to estimate the total population is called


  2. population, community, ecosystemWhich of the following sequences goes from the simplest level to the most complex?


  3. treesAn organism's role in an ecosystem is called its


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