Food chains and food webs — Normal
Apply the topic independently and explain your method. No hints during the test.
Includes extension practice
Food webs, trophic levels, inefficient transfer and crop/livestock energy comparisons are required. Pyramids of numbers, biomass and energy add material beyond the explicit list.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge 0973 syllabus2028–2029 · B18.2.1–15
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