The graph below is of an index of diversity of arthropods in three different plots of a cornfield. In one of the three plots an insecticide was sprayed. Answer the questions below about this situation.
Arthropod diversity in three cornfield plots.
-Which of the following conclusions is supported by the data shown in the graph?

Question

The graph below is of an index of diversity of arthropods in three different plots of a cornfield. In one of the three plots an insecticide was sprayed. Answer the questions below about this situation.
  Arthropod diversity in three cornfield plots.
-Which of the following conclusions is supported by the data shown in the graph?

Quizplus · Accepted Answer

The graph shows that the index of diversity for all three plots combined was highest in July. Therefore, option C is correct. Option A is incorrect because the graph only shows changes in the number of individuals, not species. Option B is incorrect because the graph shows that there were more arthropods in June than in July, and September had the lowest number of arthropods overall. Option D is incorrect because while Plot 2 did have the highest index of diversity in August, the question asks about overall species diversity, not just one month.

The Graph Below Is of an Index of Diversity of Arthropods