IB Biology HL 4.1.11 Interspecific interactions and evidence Question Bank
Practise IB Biology HL 4.1.11 by analysing ecological evidence for interactions between species.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Distinguish mutualism, parasitism, predation and competition using evidence.
- Evaluate field data to infer how interspecific interactions change population outcomes.
C4.1.11—Interspecific relationships question 1
The photograph shows Japanese knotweed, Reynoutria japonica, which is native to Japan, China and Korea. It has been introduced into other regions of the world and is now an invasive alien species in parts of Europe and North America. Dense groups of stems often develop with a height of up to 3 metres, which prevent other plants from growing.
Suggest two ways in which a plant such as Reynoutria japonica could prevent the growth of other plants.
All question bank results loaded