Standard Science Primary 6 Interactions

Study the food web below. What would be the immediate effect on the population of Organism Z if all Organism Y were killed by a disease?

A The population of Z will increase.
B The population of Z will remain the same.
C The population of Z will start eating Producers.
D The population of Z will decrease.
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Worked Solution

Step 1: Identify the relationship. The arrow points from Y to Z, meaning Z eats Y. Step [2-9]: If Y is removed, Z has less food available. Step [2-9]: Therefore, the population of Z will decrease due to starvation or migration.

Correct answer: The population of Z will decrease.

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