The student provides a focused and detailed description of the main topic, clearly stating the aim of the experiment to investigate the effect of adding different sugar substrates on yeast fermentation. The research question is also present, although no comments were provided for this subcriterion. The student provides relevant background information on the fungi species that are relevant to this experiment, contributing to the reader's understanding of the topic. The biology is explained well enough for the reader to fully understand it without the need for rereading. The student appropriately states and explains a null and alternative hypothesis. The methodology of the investigation is highly appropriate to the topic, including the use of a CO2 sensor to indirectly measure fermentation rate. The methodology is focused on answering the research question, clearly identifying the independent and dependent variables. The student also includes appropriate steps to assure the relevancy and validity of the obtained results, such as controlling variables like temperature or duration. The student shows full awareness of safety hazards, ethical concerns, and environmental issues that can arise during the experiment.
