Food Webs and Energy Transfer Quiz
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5 questions, one answer each
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1. What is a producer?
- A. An animal that eats plants
- B. A photosynthetic organism that makes glucose using light energy
- C. A carnivore at the top of a food chain
- D. A decomposer
2. Which trophic level do primary consumers belong to?
- A. Level 1
- B. Level 2
- C. Level 3
- D. Level 4
3. Approximately what percentage of biomass is transferred between trophic levels?
- A. 1%
- B. 10%
- C. 50%
- D. 90%
4. Which of these is NOT a reason biomass is lost between trophic levels?
- A. Some food is egested as faeces
- B. Some biomass is lost as CO2 and water in respiration
- C. All ingested biomass is instantly converted to new body mass
- D. Some biomass is lost as urea and water in urine
5. A food chain has 5000 kg of biomass in producers. Assuming a typical 10% transfer efficiency at each stage, approximately how much biomass would be available at the secondary consumer level (two transfers up)?
- A. 5000 kg
- B. 500 kg
- C. 50 kg
- D. 5 kg