Advanced Science Primary 6 Interactions

Study the food web: Plant → Insect → Spider → Bird. If the population of birds decreases suddenly, which of the following is most likely to happen initially?

A The insect population will increase.
B The spider population will increase.
C The plant population will remain unchanged.
D The plant population will increase.
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Worked Solution

Step 1: Birds are predators of spiders. Step [2-9]: Fewer birds mean less predation on spiders. Step [2-9]: Therefore, the spider population will increase initially.

Correct answer: The spider population will increase.

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