Invasive species are non-native organisms that cause ecological or economic harm in a new environment. In a comprehensive environmental survey of a river basin, scientists recorded a total of 1,8641,8641,864 non-native species. Out of these recorded species, 1,1851,1851,185 were plants, while the rest were animals or other organisms.
Suggest what is meant by the term non-native species.
Calculate the percentage of these recorded non-native species that are plants. Give your answer to one decimal place. Show your working.
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.