Scientists investigated antibiotic pollution in two different lakes, Lake Albert and Lake Edward. They counted how many species of bacteria were resistant to antibiotics and how many species of bacteria were killed by antibiotics. Their results are shown in the table below:
| In Lake Albert | In Lake Edward | |
|---|---|---|
| Resistant to antibiotics | 65 | 30 |
| Killed by antibiotics | 25 | 45 |
Which lake is likely to have the highest levels of antibiotic pollution? Explain your answer.
Practise OCR GCSE Biology Natural selection and evolution with exam-style questions for Foundation and Higher tier. 58 questions, matched to the OCR GCSE Biology (J247) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.