The student clearly defines the independent variable as saccharide degree of polymerisation and the dependent variable as net dry biomass, and specifies the gravimetric method and incubation conditions in the research question. The student provides relevant background theory and explains the choice of substrates, control, measurement techniques, trial numbers, concentrations, and incubation duration. Controlled variables are identified with methods for keeping them constant, and safety, ethical, and environmental considerations are addressed. The student describes a clear, reproducible procedure with appropriate materials and detailed steps, without irrelevant or repetitive methodological information.
