Marram grass is a plant species that commonly grows on coastal sand dunes. Which of the following is an abiotic factor that is likely to affect the growth of marram grass?
the concentration of salt in the dune soil
the concentration of nitrogen gas in the atmosphere
the presence of herbivorous rabbits feeding on the grass
the species of mycorrhizal fungi associated with the grass roots
37 exam-style questions on OCR A A Level Biology Ecosystems. Each one has a worked solution and a mark scheme showing where the marks go.