IB Biology HL C4.1.18 Allelopathy and Antibiotics Questions

Explain named allelochemical release and evaluate effects on neighbouring plant growth, resource access and competitive interactions in IB Biology HL C4.1.18.

Exam points

Explain how a named plant releases secondary metabolites or allelochemicals that inhibit germination or growth of neighbouring plants.
Evaluate how chemical inhibition changes competitive interactions, resource access and the abundance or distribution of neighbouring species.

[Maximum number: 3]

The image shows mycorrhizal fungi growing between the cells of a recently germinated orchid plant.

Figure for Question IB Biology HL C4.1.18 Allelopathy and Antibiotics Questions question 1 — IB Biology HL

Explain how a named plant can reduce competition by allelopathy.

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IB Biology HL C4.1.18 Allelopathy and Antibiotics Questions question 1