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IB Biology HL 4.1.6 Saprotrophic Nutrition Question Bank

Practise IB Biology HL 4.1.6 by classifying fungal and bacterial saprotrophs and explaining their role in recycling ecosystem nutrients.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Classify fungal nutrition data and distinguish saprotrophs from detritivores.
  • Explain how bacteria and fungi digest organic waste and recycle nutrients.

B4.2.6—Saprotrophic nutrition question 1

[Maximum number: 1]

The pie chart shows the modes of nutrition of fungi in Huahu Lake wetland in China.

Figure for Question B4.2.6—Saprotrophic nutrition question 1 — IB Biology HL

What is the most common mode of nutrition of fungi in this wetland?

A

Heterotrophic fungi that feed on living organisms by ingestion

B

Autotrophic fungi that obtain organic nutrients from detritus by internal digestion

C

Fungi that have either an autotrophic or heterotrophic method of nutrition

D

Heterotrophic fungi obtaining nutrients from dead organisms by external digestion

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