Watch living systems change: evolve populations, breed genetic crosses, follow epidemics and food webs, and see what limits a leaf or a neuron.
10 live simulators
Evolve a population of moths on light and dark bark, change the selection pressure and mutation rate, and track trait frequencies across generations.
Class 11–12Class 12 Biology: Evolution
Launch simulator: Natural Selection
Choose parental alleles for one or two genes, build the Punnett square, and compare expected offspring ratios with a random sample of offspring.
Class 9–10 · Class 11–12Class 10 Science: Heredity; Class 12 Biology: Principles of Inheritance and Variation
Launch simulator: Genetic Crosses
Model rabbits and foxes with the Lotka–Volterra equations, change growth and predation rates, and inspect population cycles and the phase-plane orbit.
Class 11–12 · College & beyondClass 12 Biology: Organisms and Populations (population interactions)
Launch simulator: Predator and Prey
Run the SIR model of an epidemic, change transmission, recovery and vaccination, and compare peak size, timing and final outbreak size.
Class 11–12 · College & beyondClass 12 Biology: Human Health and Disease; the SIR model is college level
Launch simulator: Epidemic Dynamics
Change substrate concentration, Vmax, Km and inhibitor type, and read reaction velocity curves and Lineweaver–Burk plots.
Class 11–12 · College & beyondClass 11 Biology: Biomolecules (enzymes)
Launch simulator: Enzyme Kinetics
Stimulate a model neuron, change stimulus strength and membrane properties, and watch threshold, action potentials, refractory periods and firing rate.
Class 9–10 · Class 11–12 · College & beyondClass 10 Science: Control and Coordination; Class 11 Biology: Neural Control and Coordination
Launch simulator: Neuron Signals
Separate two solutions with a semi-permeable membrane, change concentrations and permeability, and watch net water movement and osmotic pressure.
Class 9–10 · Class 11–12Class 9 Science: The Fundamental Unit of Life (osmosis); Class 12 Chemistry: Solutions (osmotic pressure)
Launch simulator: Osmosis
Adjust light intensity, carbon dioxide and temperature for a leaf, and explore which factor limits the rate of photosynthesis.
Class 6–8 · Class 9–10 · Class 11–12Class 7 Science: nutrition in plants; Class 10 Science: Life Processes; Class 11 Biology: Photosynthesis in Higher Plants
Launch simulator: Photosynthesis
Change species populations in a small grassland food web and follow how a change in one species ripples through the others.
Class 6–8 · Class 9–10 · Class 11–12Class 10 Science: Our Environment (food chains and webs); Class 12 Biology: Ecosystem
Launch simulator: Food Web
Run many populations at once under pure chance (Wright–Fisher model), change population size, and compare how fast alleles fix or vanish.
Class 11–12 · College & beyondClass 12 Biology: Evolution (Hardy–Weinberg, genetic drift)
Launch simulator: Genetic DriftSee the planned labs below, or pick another topic.