A person takes a medicine that reduces hydrochloric acid production in the stomach. The person swallows the same number of bacteria before and after taking the medicine.
Which prediction is most likely?
fewer bacteria survive because the chemical defence is reduced
more bacteria survive because the physical defence is increased
fewer bacteria survive because the physical defence is increased
more bacteria survive because the chemical defence is reduced
45 exam-style questions on Edexcel GCSE Biology 5.2 Plant and body defences, covering 5.2.1 Physical plant defences, 5.2.2 Chemical plant defences, 5.2.3 Detecting plant diseases, and 5.2.4 Human physical and chemical defences. Each one has a worked solution and a mark scheme showing where the marks go.