Biology 9-1 4BI1: Ecology and The Environment Topical Past Paper Questions
Edexcel IGCSE (9-1) Biology 9-1 (4BI1) past-paper questions on Ecology and The Environment, free. This topic is frequently examined across 13 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
A student investigates the effect of deforestation on the biodiversity of different insect species. The student counts the number of different insect species in 10 sample areas in a forest, and also in 10 sample areas in a deforested region. The table shows the student's results.…
(a) Using the recommended amount of fertiliser on a crop increases crop yield. Some farmers think that adding extra fertiliser will give an even greater crop yield. (i) Give a reason why adding extra fertiliser does not result in an even greater crop yield. (1) (ii) Some farmers…
The diagram shows the nitrogen cycle. Some of the stages have been labelled. (a) (i) Which stage shows nitrogen fixation? A P B Q C T D V (ii) Which stage shows nitrification? A Q B U C T D W Which stage shows denitrification? ☒ A P ☒ B T ☒ C V ☒ D W (1) ( (b) Farmers sometimes a…
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