IB ESS HL 2.2.5 Producers Questions
Use IB ESS HL 2.2.5 questions to describe primary producers at the first trophic level, linking producer biomass to food available for consumers.
- Syllabus
- First assessment 2026
- Course
- ESS HL
- Level
- HL
Exam points
- describe primary producers as the first trophic level and source of biomass for consumers
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IB ESS HL 2.2.5 Producers Questions question 1
[Maximum number: 4]
Describe the role of primary producers in ecosystems.
producers are plants that convert light energy into chemical energy by photosynthesis;
photosynthesis/primary producers convert carbon dioxide and water into glucose/sugar and oxygen;
this conversion/glucose forms the raw material of biomass/the basis of food chains;
producers (thereby) provide food for consumers/energy in a form that can be passed along food chains;
the production of oxygen by producers is vital for the majority of ecosystems;
the absorption of CO2 maintains a balance of CO2 in atmosphere/reduces global warming;
primary producers may alternatively generate biomass through chemosynthesis;
chemosynthetic bacteria use chemical energy to produce food without using sunlight;
plants may also provide other resources/services for ecosystem eg habitats/soil conservation/cycling of matter;
Marking guidance:
Award [1] for each correct role described, up to [4 max].
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