Antibiotics are frequently used in intensive livestock farming to prevent disease and promote growth.
Name the kingdom of prokaryotic organisms targeted by these antibiotics.
Name the cellular structure present in these organisms, but absent in animal cells, that is a target for penicillin-class antibiotics.
Over time, some antibiotics are no longer effective at controlling bacterial populations in agricultural run-off. Use your knowledge of natural selection to explain why.
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.