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IB Biology HL 4.1.5 Mixotrophic Nutrition Question Bank

Practise IB Biology HL 4.1.5 by identifying mixotrophs and explaining how organisms combine photosynthetic and heterotrophic energy sources.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify mixotrophic organisms in plant, protist and Arctic energy-flow examples.
  • Explain how photosynthesis and feeding on other organisms combine in mixotrophic nutrition.

B4.2.5—Mixotrophic nutrition question 1

[Maximum number: 1]

The diagram shows the flow of energy between some Arctic species.

Figure for Question B4.2.5—Mixotrophic nutrition question 1 — IB Biology HL

Which organism is a mixotroph?

A

Bacteria

B

Nanoflagellates

C

Micromonas

D

Copepods

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