Exam (elaborations)
Biology Edexcel IGCSE Exam 2B Questions with Complete Solutions for Exam preparation
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Pathogens - Ans (an organism that) causes disease Describe how a non-resistant Staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin (3) - Ans1. mutation; 2. (involves) gene / DNA / allele / genetic material 3. random / chance / rare/spontaneous Explain how...
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