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4 Written questions

3 Multiple choice questions

  1. Which of the following is NOT a biotic factor?
  2. Which of the following sequences goes from the simplest level to the most complex?
  3. The struggle among organisms for the limited resources in an ecosystem is called

3 True/False questions

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


  2. symbiosisThe relationship between humans and Escherichia coli bacteria in their intestines is an example of


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


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