IB Biology EE examples

What is the effect of increasing concentrations of copper (II) sulphate (0.0, 1.0, 3.0, 5.0, 7.0, 9.0 mg/L) on the inhibition of Vigna radiata shoot length growth in cm, and the content of chlorophyll a and b after 14 days as measured by a UV spectrophotometer at wavelengths 644nm and 647nm?

How does the varying concentration (0.0 %, 0.1 %, 0.3 %, 0.5% and 0.7 %) of Allium sativum L. powder solution affect the collagen elasticity as measured by the distance travelled by samples in a gelatine matrix in 24 hours?

How does the type of a commercial kombucha brand (Le GUTsy Captain Kombucha, Germline Kombucha Original, KOKO Original, The Happy, and Ucha) influence the inhibition zone diameter (mm) against Escherichia coli, tested using disc diffusion assay after 24 and 48 hours?

How does variation of temperatures (26, 31, 37,43, 49 oC) affect triglyceride hydrolysis by lipase, measured by changes in pH?

How does exposure to synthetic oestrogen 17α-ethinylestradiol (EE2) affect endocrine, physiological, and hatching success in fathead minnows (Pimephales promelas)?

How do various Scoville Heat Units of chilli species (Capsicum annuum ‘Jalapeño’, Capsicum annuum ‘Bird’s eye’, Capsicum annuum L., Capsicum chinense, Capsicum chinense Jaqc.) affect lipid digestion, measured by pH changes over a 30-minute?

How do different phytochemicals (resveratrol, glyceollin, epigallocatechin- 3-gallate (EGCG)) inhibit the growth of Bacillus subtilis as the model organisms, compared to ciprofloxacin used to treat otitis externa caused by Staphylococcus aureus?

How do different concentrations (0.0, 0.1, 0.5 and 50 mM) of glucose affect the germination rate of wheat seeds (Triticum aestivum) under salinity stress (200 mM NaCl) over 5 days?

To what extent do varying concentrations of Kalanchoe (Bryophyllum pinnatum) extract inhibit the proliferation of K-12 Escherichia coli and Staphylococcus aureus in LB Agar Petri dishes?

To what extent does the Rhizophagus intraradices fungus affect the nutrient uptake and growth of the Mentha spicata plant under different phosphorus levels (2g and 5g), measured by morphological characteristics (leaf count and plant height (cm) and spectrophotometry, with data collected at weekly intervals over the three-week experimental period?

How do pesticides cause misfolding of proteins measured by the pathogenesis of neurodegenerative diseases, focusing on Parkinson’s?

How do different commercial kombucha brands affect the zone of inhibition (mm) of Escherichia coli (E. coli ) using filter paper disc assay over a period of 24 and 48 hours?

How does increasing concentrations of copper (II) ion in aqueous copper (II) sulphate (0.00, 0.20, 0.40, 0.60, 0.80 and 1.00 mg/L) affect the growth of L. minor and thus it’s phytoremediation abilities as measured through the percentage change in wet biomass of the L. minor over 7 days?

To investigate the effect of various concentrations of copper (II) sulfate solutions (0.0 mg/L, 1.0 mg/L, 3.0 mg/L, 5.0 mg/L, 7.0 mg/L, 9.0 mg/L) on Vigna radiata plant growth using a soilless media, measured through the change in shoot length using a ruler (±0.05cm), and the difference in chlorophyll a and b absorbance values using a UV spectrophotometer (±0.001AU), at wavelengths of 664nm and 647nm respectively over a 14 day period.

How does the concentration (g/L) of the “Malibu SPF30 Kids Lotion Protection” chemical sunscreen (0.0, 1.0, 2.5, 5.0, 10) affect the rate of photosynthesis (ppm/s) of freshwater green algae (Chlorella sp.) in terms of the decrease in CO2 concentration over time, measured using a wireless CO2 sensor for 5400s at 20ºC?

To investigate the effect of increasing concentration (volume/volume ratio) of malathion (0.1%,0.2%,0.3%,0.4%,0.5%) an insecticide, on the total chlorophyll content measured through a spectrophotometer at 630,691,664 and 647nm, total carotenoid content, measured at 470nm, and percentage inhibition on electron transport, measured by the rate of decolorization of DCPIP at 600nm, of Elodea canadensis.

To what extent do different honey brands affect their antibacterial activity to test their hydrogen peroxide content using permanganometric titration?

To what extent do cosmetic procedures like bleaching and heat straightening affect the tensile strength of Homo sapiens hair?

To what extent does the amount of gentamicin given to Bacillus subtilis inhibit their growth?

To what extent does the neurobiology of clinical depression and its associated treatments- (antidepressants) influence sleep patterns?

What is the Effect of Salinity Stress (0, 50, 100, 150, 200 mM NaCl) Measured Through Microscopic (Stomatal Aperture) and Morphological (Leaf Area, Leaf Dry Mass, and Root Length) Characteristics on Pre-Treated Radish (Raphanus sativus) Seeds with Magnetopriming (48 hours)?

How effective is the Cone Repair technique when treating Ebstein’s Anomaly in comparison to other treatments?

How do different concentrations of Punica granatum extracts: Peel, Flower and Leaves (10, 20, 30, 40 and 50 mg/ml) affect the rate of reaction of α-amylase and compare with metformin (anti-diabetic drug) as measured by a spectrophotometer at 587nm?

To what extent do extracts of Allium sativum (garlic) and Zingiber officinale (ginger) reduce antimicrobial activity and how effective it is compared to antibiotics?

To what extent is blood pressure related to the development of Alzheimer’s Disease in people in age above 50?

To what extent do phytochemicals such as resveratrol, glyceollin and epigallocatechin-3-gallate (EGCG) possess comparable antibacterial effects against Staphylococcus aureus bacteria to a non-prescription otitis externa (OE) treatments such as Ciprofloxacin using Bacillus subtilis as a prokaryotic model organism?

To what extent do different species of chili pepper consumption biologically affect the rate of lipid digestion in terms of pH change within 30 minutes?

To what extent does inhaling e-cigarettes affect the lungs’ vital capacity of high school students in Jakarta?

To what extent do phytochemicals such as resveratrol, glyceollin and epigallocatechin-3-gallate (EGCG) possess comparable antibacterial effects against Staphylococcus aureus bacteria to a non-prescription otitis externa (OE) treatments such as Ciprofloxacin using Bacillus subtilis as a prokaryotic model organism?

To what extent do different concentrations of Magnesium Nitrate (10, 20, 30, 40, 50 mM) affect the concentration of chlorophyll a and b in Ocimum basilicum at 645 nm and 662 nm wavelength using spectrophotometer?

To what extent does the presence of acetaminophen (Tylenol), Polymixin B (Polysporin), and diphenhydramine hydrochloride (Benadryl) in the growth medium of Cotoneaster acutifolius affect the average change in leaf length over a period of 15 days in five different concentrations?

To what extent does varying the duration (0 mins, 5 mins, 10 mins, 15 mins, 20 mins, 25 mins) at which a 25% solution consisting of ethanol-dissolved ayurvedic spices (curcumin and black cumin) is maintained at 60°C affect the antimicrobial activity of these spices against a K12 strain of Escherichia coli?

To what extent does irrigation with carbonated water affect the ferric ion (Fe3+) nutrient content of Brassica oleracea ‘Black Tuscany’ microgreens?

How Does The Pollution of Oestrogens into Freshwater Systems Affect the Biological Processes of Fathead Minnows?

To what extent does high intensity interval training (HIIT) effect the maximum oxygen uptake (VO2max) in sedentary populations?

What is the effect of seawater mixture (0%, 5%, 10%) on the germination of black chickpeas (Cicer arietinum), Green Gram (Vigna radiata) and Fenugreek (Trigonella foenum-graecum) for 5 days and their subsequent growth when watered using tap water for 10 days where growth was measured by plant height (±0.05 cm) and dry mass (±0.001 g)?

To what extent do the antibacterial properties of metals copper, barium and silver aid in the inhibition of the growth of bacteria Staphylocollucus albus?

“Is the cone repair a suitable approach for severe forms of Ebstein anomaly?”

To what extent does the denaturation of lipase at controlled temperatures (26, 31, 37, 43, 49 ºC) affect its catalytic breakdown of triglycerides into glycerol and fatty acids, as measured by the percentage change in pH, and what implications does this have for inflammatory processes and hyperthermia-based treatments of pancreatic cancer?

To what extent does a high ultra-processed food diet affect the cognitive development of the foetus in Homo sapiens as measured using early-year cognitive tests?