Some grape growers use geese as a method of biological control in their orchards and vineyards.
The geese help grapevine plants to grow because they eat insect pests and weeds.
Suggest how the geese eating insect pests helps the grapevines to grow.
Explain how the geese eating weeds helps the grapevines to grow.
Explain why droppings (faeces) from the geese help grapevines to grow.
Geese walk through the vineyard, loosening the surface soil with their feet, which increases the oxygen content of the soil. Suggest how increasing the oxygen content of the soil helps the grapevine roots to grow.
Using geese as a method of biological control allows the grower to produce grapes without using chemical sprays.
Suggest what is meant by the term insecticide.
Give three advantages of using biological control rather than using chemical pesticides.
44 exam-style questions on Edexcel IGCSE Biology Human influences on the environment. Each one has a worked solution and a mark scheme showing where the marks go.