Standard Science Primary 6 Interactions

Study the food chain: Algae → Small Fish → Large Fish → Heron. If the population of Large Fish decreases due to overfishing, what happens to the Algae population?

A It becomes extinct.
B It increases.
C It decreases.
D It remains the same.
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Worked Solution

Step 1: Fewer Large Fish means fewer predators for Small Fish. Step [2-9]: The Small Fish population will increase. Step [2-9]: More Small Fish will consume more Algae, leading to a decrease in the Algae population.

Correct answer: It decreases.

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