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Twelve researchable EE topics grouped by the 4 themes of the 2025 syllabus. Each entry gives a specific research question, experimental scope, and the practical challenges that decide whether you can actually deliver the project.
RQ: To what extent does ethanol concentration affect the population growth rate of three Saccharomyces cerevisiae strains (brewing, baking, and wild-type)?
RQ: How does quadrat sample size influence the Simpson diversity index in a temperate grassland community?
RQ: Does the synergy between two common antibiotics differ between Escherichia coli and Staphylococcus epidermidis (school-safe strain)?
RQ: How does elevation affect the stomatal density and guard-cell length of Rhododendron arboreum leaves along a 1000 m altitudinal gradient?
RQ: How does regular endurance training (≥5 hours per week) affect the rate of post-exercise heart-rate recovery in 16–18 year-olds?
RQ: To what extent does available phosphate affect primary root length, lateral root density, and root-to-shoot biomass ratio in Arabidopsis thaliana seedlings?
RQ: How do aqueous extracts of Lantana camara leaves affect the germination rate and seedling biomass of two native grassland species in Delhi NCR?
RQ: How do diurnal changes in canopy light intensity affect the measured photosynthesis rate (leaf-disc method) in Ficus religiosa leaves?
RQ: How does incubation temperature affect CO₂ efflux from soil of three different land uses (forest, agricultural, urban) in a temperate climate?
RQ: To what extent does a single-generation UV-C exposure increase the frequency of visible mutations in F2 Drosophila melanogaster offspring?
RQ: To what extent does mean March temperature (1990–2024) correlate with first-flowering date in three Delhi NCR tree species, using iNaturalist and local herbarium records?
RQ: Does the observed allele frequency for PTC tasting in a sample of 200 consenting Indian expatriate students in three cities deviate significantly from Hardy-Weinberg equilibrium?
Good EE topics are: specific enough to answer in 4,000 words; accessible with your school equipment or public datasets; intellectually interesting enough to sustain 40 hours of independent work; and narrow enough that you can defend the RQ against "why that variable range?"
Only if your supervisor agrees. A mid-project switch resets the timeline and usually caps grade at B–C due to reduced depth. Switching is usually only advisable if data collection has definitively failed and a variant topic can reuse the same methodology.
It is a sensible strategic choice for university applications but not a scoring requirement. A grade-A EE on any biology topic is more valuable than a grade-B EE on a "strategically" chosen topic. Pick for feasibility and interest first.
A free 30-minute topic-validation call — we'll stress-test your RQ against the 5 EE criteria.
Book EE Topic Review