IB Biology HL C4.1.18 Allelopathy and Antibiotics Questions

Allelopathy releases chemicals that inhibit competitor germination or growth. Antibiotics such as penicillin are microbial allelochemicals produced by fungi such as Penicillium.

Exam points

Explain how a named plant releases allelochemicals that inhibit the germination or growth of neighbouring plants.
Relate chemical inhibition to competition by explaining how reduced competitor growth can change resource availability or plant-community structure.

[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