The newest 20 of 42 written questions. Open one to see it on the real paper.
Identify the primary consumers and secondary consumer in the food web. Also identify an organism that feeds at trophic level two and three.
See it on the paper →Calculate the biomass at trophic level two and three, given the biomass at trophic level one and the efficiency of energy transfer.
See it on the paper →State the tertiary consumer in this food chain.
See it on the paper →Explain why food chains contain larger numbers of primary consumers than secondary consumers.
See it on the paper →Scientists think that a decrease in the pangolin population will impact the populations of other organisms at the same trophic level. Suggest why the populations of other organisms at the same trophic level will: ooo.
See it on the paper →A food chain for brown bears is shown. apple tree > ant > caterpillar > brown bear Describe fully what this food chain shows.
See it on the paper →Mangrove trees are producers. The roots of mangrove trees provide shelter for marine organisms such as fish, shrimp and lobster. Crabs eat mangrove roots and dead leaves. Fish eat crabs. Humans eat crabs, fish, shrimp and lobster. Use the information to write a food chain with four trophic levels. (iv) Complete the sen...
See it on the paper →Comprehensive responses • Correct identification of the four organisms in the list to form the food chain. • Inclusion of arrows in the correct direction. Limited responses • Incorrect inclusion of additional organisms to form a food web rather than a food chain. • Omission of arrows in the chain or pointing in the wrong direction.
— Examiner report, February/March 2026, 0680/12 Q7(a)(ii) (Cambridge)
Most could put the four organisms into a sequence with arrows indicating the correct energy flow. Some with the correct order lost credit because their arrows went back through the trophic levels, while some omitted an organism or transposed organisms out of sequence.
— Examiner report, May/June 2025, 0680/21 Q2(a)(i) (Cambridge)
Most could put the four organisms into a sequence with arrows indicating the correct energy flow. Some with the correct order lost credit because their arrows went back through the trophic levels, while some omitted an organism or transposed organisms out of sequence.
— Examiner report, May/June 2025, 0680/23 Q2(a)(i) (Cambridge)
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Name the tertiary consumer in this diagram.
See it on the paper →State the term used to describe each level in this diagram.
See it on the paper →Explain why only a small number of animals are at the top of this pyramid of energy.
See it on the paper →State what the arrows in the food web show.
See it on the paper →Use the food web to write a food chain that includes five trophic levels.
See it on the paper →Construct a food chain for these organisms.
See it on the paper →Construct a food chain for these organisms.
See it on the paper →Use the fact sheet to write a food chain with four trophic levels that includes flamingos.
See it on the paper →Explain why the organism at the first trophic level in a food chain is a producer.
See it on the paper →The Peruvian fox lives in the Atacama Desert. This area has been very dry for millions of years. Explain why Peruvian foxes need to feed as primary consumers, secondary consumers and on dead organisms.
See it on the paper →Explain the difference between a food chain and a food web.
See it on the paper →Plot a bar chart of the data.
See it on the paper →Calculate the percentage increase in the mass of exported salmon from 2016 to 2020.
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