The diagram shows a food chain.
plant leaf → slug → frog → fox
Which terms describe the position of the fox in this food chain?
▶️ Answer/Explanation
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.
Which diagram shows a pyramid of biomass for the food chain shown?
▶️ Answer/Explanation
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.