Energy transfer in ecosystems Quiz
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5 questions, one answer each
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1. In the food chain algae → shrimp → fish → seal, which organism is the tertiary consumer?
- A. The seal
- B. The fish
- C. The shrimp
- D. The algae
2. A sparrowhawk eats blue tits that eat caterpillars. Which statement about the energy lost by the blue tits is correct?
- A. None is lost because they are carnivores
- B. Some is lost as heat from respiration
- C. All of it is passed on to the sparrowhawk
- D. It is lost only when the tits die
3. A pyramid of biomass is often more reliable than a pyramid of numbers because it...
- A. counts every individual
- B. only includes the producers
- C. takes account of the size of the organisms
- D. measures energy lost as heat
4. A pig is supplied with 4000 kJ and gains 600 kJ of new tissue. What is the efficiency?
- A. 6.7%
- B. 60%
- C. 24%
- D. 15%
5. Why is there less energy available to a top predator than to a herbivore in the same food chain?
- A. Energy is lost at each trophic level
- B. Predators do not respire
- C. Herbivores store all their energy
- D. The Sun gives less energy to predators