The student incorporated relevant and appropriate source material throughout the essay, effectively supporting their investigation into the effects of gentamicin on Bacillus subtilis with credible citations from recognized scientific sources. The use of in-text citations contributed to the clarity and attribution of information, enhancing the overall credibility of the work. However, the student did not consistently explain technical terms, such as "subtilisin," which limited the demonstration of their understanding of the topic. Additionally, the essay suffered from an oversaturation of jargon, particularly with the repeated use of "Bacillus subtilis" without abbreviation, and inconsistent application of significant figures in numerical data. Despite these issues, the tone and style of the essay maintained an academic level appropriate for an extended essay.