IB Biology SL C4.1.12 Mutualism As Interspecific Relationship Questions

Use coral–algae, ants–Acacia, squirrel–spruce and root-nodule examples to trace the resources or protection exchanged in mutualistic relationships in IB Biology SL C4.1.12.

Exam points

Define mutualism as an interspecific relationship in which both species benefit, and distinguish it from parasitism where only one species benefits.
Explain the exchanged resource or protection in mutualistic examples such as coral–zooxanthellae, ants–Acacia, squirrel–spruce or legume root-nodule associations.

[Maximum number: 3]

Reef-building corals are an association between two organisms: coral polyps and Zooxanthellae.

Figure for Question IB Biology SL C4.1.12 Mutualism As Interspecific Relationship Questions question 1 — IB Biology SL

(a)

State the relationship between Zooxanthellae and coral reef species.

[ 1 ]

(b)

Describe the exchange of materials between the coral's polyps and Zooxanthellae.

[ 2 ]

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IB Biology SL C4.1.12 Mutualism As Interspecific Relationship Questions question 1

Question (a)

Question (b)