Home / iGCSE Biology (0610)-19.2 Food chains and food webs – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-19.2 Food chains and food webs – iGCSE Style Questions Paper 1

Question

The diagram shows a food chain.

plant leaf → slug → frog → fox

Which terms describe the position of the fox in this food chain?

Food Chain Diagram

▶️ Answer/Explanation
Solution

Ans: D

In the given food chain (plant → slug → frog → fox), the fox occupies the highest trophic level as a tertiary consumer (D). It preys on the frog (secondary consumer), which itself consumes the slug (primary consumer).

Key terms for the fox’s position include: • Apex predator (no natural predators) • Carnivore (meat-eater) • Tertiary consumer (third-level consumer). Thus, the correct answer is D.

Question

Which diagram shows a pyramid of biomass for the food chain shown?

Food Chain Diagram

▶️ Answer/Explanation
Solution

Ans: A

A pyramid of biomass represents the total mass of organisms at each trophic level, which typically decreases as you move up the food chain due to energy loss (10% rule).

Key observations:

  • Producers (plants) have the highest biomass.
  • Primary consumers (herbivores) have less biomass than producers.
  • Secondary consumers (carnivores) have the least biomass.

Option A correctly shows this decreasing pattern, while other options either invert the pyramid or show incorrect proportions.

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