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IB Biology HL B4.2.5 Mixotrophic Nutrition Questions

Explore how Euglena, Prorocentrum and Micromonas use both photosynthetic energy capture and feeding on other organisms in IB Biology HL B4.2.5.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify mixotrophs in ecological or organism diagrams by recognizing simultaneous photosynthetic energy capture and feeding on other organisms.
  • Explain how Euglena, Prorocentrum or Micromonas combine light-based autotrophy with heterotrophic ingestion or organic-carbon uptake.

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Study B4.2.5—Mixotrophic nutrition conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL B4.2.5 Mixotrophic Nutrition Questions question 1

[Maximum number: 1]

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

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

Which organism is a mixotroph?

A

Bacteria

B

Nanoflagellates

C

Micromonas

D

Copepods

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