B4.2.11—Plant form for light harvesting
Plant form for light harvesting reflects competition in forest strata, where growth habit, leaf traits and reproductive signals improve light access.
- Syllabus
- First assessment 2025
- Objective
- B4.2.11
- Level
- HL
Concept essentials
- Forest strata create strong gradients in light availability.
- Canopy trees, lianas and epiphytes reach light using different forms.
- Shade-tolerant plants can survive under low-light conditions.
- Plant form can reflect competition for light rather than only water or nutrients.
ConceptIB Biology HL