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Northern IrelandBiologyQuick questions
Genetics, Evolution and Ecosystems
Quick questions on Ecosystems and conservation: energy flow, nutrient cycles and succession - CCEA A-Level Biology
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
Explain why food chains rarely have more than four or five trophic levels. [2 marks]
What is q2?Show answer
State the role of nitrogen-fixing bacteria in the nitrogen cycle. [1 mark]
What is q3?Show answer
A producer fixes . Estimate the energy available to a secondary consumer two levels up, assuming 10 percent transfer at each step. [2 marks]
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