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Item ID032004: Changes in a population in a food web can affect populations of other organisms even if they are not directly connected in a feeding relationship (no specific organisms identified).

The diagram below shows the feeding relationships between populations of organisms L, M, and N. The arrows point from the organisms being eaten to the organisms that eat them.

Using only the relationships between the organisms shown in the diagram, which of the following statements describes what will happen to the number of Ns if most of the Ls are killed and why?

  1. The number of Ns will decrease because there are more Ms to eat them.
  2. The number of Ns will decrease because there will be fewer Ms for them to eat.
  3. The number of Ns will not change because Ns are not connected to Ls in the diagram.
  4. More information is needed to tell what will happen to the number of Ns.
Distribution of Responses
Chart showing distrubtion of responses for Item 032004
Students Responding Correctly
Group Correct Total Percent
Overall 1712 2797 61%
Grades
  6–8 853 1536 56%
  9–12 853 1253 68%
Gender
  Male849132364%
  Female821140758%
Primary Language
  English1522245662%
  Other14927055%

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