Biology simulations
36 interactive Biology simulations for ages 11–18, grouped by topic.
- Biology · Cell Biology Levels of biological organization Zoom continuously from molecules up to the biosphere: molecule, organelle, cell, tissue, organ, organ system, organism, population,... Ages 15–16
- Biology · Cell Biology Cell cycle and mitosis The cell cycle ring runs G1 → S → G2 → M with a phase hand, three checkpoints, and a DNA-content graph; alongside it, an animated cell... Ages 15–16
- Biology · Cell Biology Enzyme activity vs. temperature, pH, substrate concentration and inhibitors The enzyme (with an active site) and substrate molecules move around and collide; when a substrate molecule fits the active site it is... Ages 15–16
- Biology · Cell Biology Meiosis and the origin of gamete variation Step through each phase of meiosis I and II in a cell with n pairs of homologous chromosomes. Toggle crossing over and watch the number... Ages 15–16
- Biology · Cell Biology Diffusion across membranes and osmosis in cells On the left, small molecules diffuse through membrane pores from high to low concentration until equilibrium, with particle counts on... Ages 15–16
- Biology · Cell Biology Water and macromolecules – polarity and hydrogen bonding The water mode draws polar H₂O molecules with an oxygen end carrying a partial negative charge and two hydrogen ends carrying a partial... Ages 15–16
- Biology · Cell Biology Eukaryotic and prokaryotic cell structure Diagrams of an animal cell, a plant cell and a bacterium with organelles drawn in their correct positions. Students click each organelle... Ages 15–16
- Biology · Microbiology & Viruses Viral replication – lytic and lysogenic cycles A phage attaches to a bacterium and injects its DNA, the host cell synthesizes viral DNA and coat protein, assembles dozens of new... Ages 15–16
- Biology · Microbiology & Viruses Fermentation – lactic acid and ethanol pathways Incubate a batch culture with microorganisms: choose the strain, temperature, initial sugar level and whether oxygen is present. The... Ages 15–16
- Biology · Microbiology & Viruses Bacterial population growth curve A bacterial population in a culture flask grows following N = N₀·2^(t/g); a graph of log N against time plots itself and colours the... Ages 15–16
- Biology · Microbiology & Viruses Bacteria in food – the temperature danger zone How long can cooked food sit out before it's unsafe? Pick a bacterium (Salmonella, Staphylococcus aureus, or Bacillus cereus in leftover... Ages 16–17
- Biology · Biotechnology Biology 10 electives – cell, enzyme, and microbial technologies Three Biology 10 elective topics in one simulation, selected with the topic parameter. Cell technology: plant tissue culture, where... Ages 15–16
- Biology · Biotechnology Industrial enzymes – Michaelis–Menten kinetics and immobilized enzymes Pick a real-world application – lactase for lactose-free milk, pectinase for clarifying fruit juice, protease in biological detergent –... Ages 15–16
- Biology · Biotechnology Plant tissue culture – micropropagation A leaf tissue explant is cultured on a medium containing auxin and cytokinin. Drag the two hormone concentrations to see how the... Ages 15–16
- Biology · Biotechnology PCR – amplifying DNA by thermal cycling Each PCR cycle consists of denaturation at 95 °C, primer annealing, and extension at 72 °C, doubling the number of copies of the target... Ages 17–18
- Biology · Biotechnology Wastewater treatment by microorganisms – activated sludge tank Wastewater rich in organic matter (high BOD) flows into a tank, where aerobic bacteria feed on the organic matter using oxygen supplied... Ages 15–16
- Biology · Plant Physiology Plant growth hormones and insect metamorphosis In plant mode, treat a seedling with a hormone at a concentration you drag along the scale: at low concentrations auxin stretches the... Ages 16–17
- Biology · Plant Physiology Photosynthesis rate – light, CO₂, temperature and the compensation point A sprig of aquatic pondweed (Hydrilla) in a beaker of water under a lamp releases O₂ bubbles faster or slower depending on light... Ages 16–17
- Biology · Plant Physiology Transpiration and stomatal control Adjust light, air humidity, wind and soil moisture, then watch the stomata open or close, the transpiration rate change, and water flow... Ages 16–17
- Biology · Plant Physiology Hydroponic vegetables – mineral nutrition and the law of the minimum Mix a nutrient solution for hydroponic vegetables by adjusting N, P, K concentrations and pH. The plant shows the exact deficiency... Ages 16–17
- Biology · Human & Animal Physiology Homeostasis – blood glucose and body temperature Eat a meal and watch blood glucose change minute by minute. In a healthy person, glucose entering the blood raises the level, pancreatic... Ages 16–17
- Biology · Human & Animal Physiology Human ovulation cycle and plant double fertilization A 28-day cycle clock runs through in about ten seconds: four curves for FSH, LH, estrogen, and progesterone change day by day, and the... Ages 16–17
- Biology · Human & Animal Physiology Neuron resting and action potential A cross-section of the neuron membrane shows Na⁺ and K⁺ ions on both sides, Na⁺ channels, K⁺ channels and the Na⁺/K⁺ pump; click... Ages 16–17
- Biology · Human & Animal Physiology Single and double circulation Compare the single circulatory system of fish side by side with the double circulatory system of mammals: blood flows along its real... Ages 16–17
- Biology · Health & Disease Biology 11 electives – mineral nutrition, human epidemics, and food safety Three Biology 11 elective topics in one simulation, selected with the topic parameter. Mineral nutrition: choose the deficient element... Ages 16–17
- Biology · Health & Disease Disease spread and herd immunity (SIR model) The SIR model divides a community into susceptible, infected, and recovered groups. Choose a disease (seasonal flu, COVID-19, measles)... Ages 16–17
- Biology · Genetics Gene mutation and its effect on the polypeptide Edit one nucleotide on the template strand: substitution, insertion or deletion. The simulation re-runs transcription–translation and... Ages 17–18
- Biology · Genetics Hardy–Weinberg equilibrium, selection and genetic drift A randomly mating population with two alleles A and a: genotype frequencies p², 2pq and q² are calculated and plotted every generation... Ages 17–18
- Biology · Genetics Gene linkage – crossing over and genetic mapping Two genes sit on the same chromosome: drag the distance between them to change the recombination frequency and watch the ratio of the... Ages 17–18
- Biology · Genetics Dihybrid cross: independent assortment, gene linkage and crossing over A two-gene Punnett square shows each parent's gametes and their frequencies, cells colour-coded by phenotype, and genotype–phenotype... Ages 17–18
- Biology · Genetics Transcription, translation and point mutations From a gene's template strand, RNA polymerase builds mRNA one nucleotide at a time by base-pairing (A–U, T–A, G–C, C–G); the ribosome... Ages 17–18
- Biology · Ecology & Environment Biology 12 electives – molecular biology, biological control, and human ecology Three Biology 12 elective topics in one simulation, selected with the topic parameter. Molecular biology: run a PCR reaction through the... Ages 17–18
- Biology · Ecology & Environment Biological pest control – natural enemies versus chemical pesticides Simulate one rice-growing season with a brown planthopper population and its natural enemies (mirid bugs, spiders). Choose a strategy:... Ages 17–18
- Biology · Ecology & Environment Food chains, energy pyramids and the carbon cycle Solar energy fixed by producers is passed along a food chain through successive trophic levels; at each level most energy is lost as... Ages 17–18
- Biology · Ecology & Environment Predator–prey dynamics – rabbits and foxes The rabbit population grows logistically, dN/dt = rN(1 − N/K), heading toward the environment's carrying capacity K; once foxes are... Ages 17–18
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