Food chains and food webs — Easy
Recall and familiar applications. Optional hints help you find a first step.
Includes extension practice
Food chains/webs and feeding categories are required. The shared set adds pyramids of numbers, biomass and energy and detailed trophic-efficiency comparisons.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge 0653 syllabus2028–2029 · B15.2.1–10
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