Study the food web below. Which of the following statement(s) is/are correct?<br>A: There are three food chains.<br>B: The owl is both a prey and a predator.<br>C: If the population of rats decreases, the owl will have less food.
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Worked Solution
Step 1: Count food chains: 1. Plant->Rat->Owl, 2. Plant->Grasshopper->Frog->Owl, 3. Plant->Grasshopper->Bird->Owl, 4. Plant->Rat->Snake->Owl. (A is wrong).
Step [2-9]: Owl has no arrows pointing from it to a predator. (B is wrong).
Step [2-9]: Owl eats rats; fewer rats mean less food. (C is correct).
Correct answer: C only
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