A crop is grown for its seeds. Flying insects transfer pollen between the crop's flowers.
The crop flowers from 1 to 21 June. The insects are active mainly from 1 to 21 May, and only a small number are active in June.
Explain how the timing of the crop's flowering could affect the mass of seeds harvested.
82 exam-style questions on Edexcel GCSE Biology 9.1 Ecosystems and interdependence, covering 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area. Each one has a worked solution and a mark scheme showing where the marks go.