IB ESS HL 2.1.9 Population Interactions Questions

Practise IB ESS HL 2.1.9 by identifying species relationships, tracing food-web consequences and explaining how competition, predation and mutualism regulate populations.

Exam points

identify interaction types from named species pairs, food webs and life-cycle diagrams
contrast predation, competition, mutualism and parasitism by their effects on each population
trace predator–prey feedback, lagged cycles and density-dependent population regulation
explain how resource overlap, seasonal access and habitat use shape competition or predation
analyse trophic cascades from herbivore or carnivore changes and link them to stability or biodiversity

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Study 2.1.9—Population interactions conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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Figure:The Eurasian wolf food web

With reference to Figure: The Eurasian wolf food web, state the ecological relationship between the Eurasian wolf (Canis lupus lupus) and the Eurasian Iynx (Lynx Iynx).

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IB ESS HL 2.1.9 Population Interactions Questions question 1