B4.2.5—Mixotrophic nutrition
Mixotrophic nutrition combines autotrophic production with heterotrophic feeding, allowing organisms to use light and organic food sources flexibly in communities.
- Syllabus
- First assessment 2025
- Objective
- B4.2.5
- Level
- HL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1A
Typical marks1
Common command terms
- Outline
- Identify
Scoring notes
- Common mistake
- Calling mixotrophs only autotrophs because they photosynthesise.
Recent exam appearances
November 2025Paper1A ["HL"] · TZ335[ 1 ]B4.2.5—Mixotrophic nutrition
Practice this objective
Coverage 2025–2025 · Updated 15 Jul 2026
Concept essentials
- Mixotrophs combine autotrophic and heterotrophic nutrition.
- Euglena can photosynthesise and feed on bacteria.
- Some mixotrophs act as both producers and consumers.
- Mixotrophy can provide nutritional flexibility in changing conditions.