HOTS Science Primary 6 Interactions

A new predator that only eats frogs is introduced into a pond. Food chain: Algae → Tadpole → Frog → Snake. What is a likely long-term effect?

A The snake population will increase.
B The algae population will decrease.
C The tadpole population will increase.
D The frog population will increase.
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Worked Solution

Step 1: New predator eats frogs → Frogs decrease. Step [2-9]: Fewer frogs → Tadpole population increases (less predation). Step [2-9]: More tadpoles eat more algae → Algae population decreases.

Correct answer: The algae population will decrease.

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