Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
ATP Balance in Photosynthesis and Cellular Respiration
One glucose yields over thirty ATP with oxygen, but only two without it.
Pedigrees & Inheritance Patterns
When neither parent shows a trait but a child does, that trait is recessive.
Transport Across Cell Membranes
Diffusion happens on its own, but moving against the gradient costs ATP.
Neuronal Action Potentials
See how the sodium-potassium pump maintains the resting potential, explore the five stages of an action potential, and discover the all-or-none response that fires only after crossing the threshold.
When Are Enzymes Fastest?
Create saturation curves by varying substrate and enzyme amounts, then explore optimal temperature and pH—and competitive inhibition.
Allele Frequencies & Natural Selection
Use allele frequency p to build genotype ratios, then change selection pressure, generations, and population size to see how frequencies shift and fluctuate.
The Flow of Genetic Information
Transcribe DNA bases into mRNA, translate the codons with the codon table, then change a single base to compare silent, missense, and nonsense mutations.
Homeostasis: Negative Feedback
Raise or lower body temperature and blood sugar to see negative feedback at work as sweating, shivering, insulin, and glucagon restore the normal range.
Stimulus and Response
Order the sensory, association, and motor neurons and switch insulin or glucagon off to see how nerves and hormones together keep the body steady.
Mitosis and Meiosis
Stretch a cube cell's side to watch surface area ÷ volume shrink, then run mitosis and meiosis to produce the daughter cells.
Microbes and Classifying Life
Raise the magnification and change temperature and humidity to sort microbes into fungi, protists, and bacteria, and see how the same ones ferment food or spoil it.
Ecological Pyramids & Population Growth
Trace the 10% energy rule up the ecological pyramid, then vary the carrying capacity to see where exponential growth bends into an S-shaped curve.
Genetic Crosses
Predict an Rr × Rr cross on a Punnett square, then draw offspring and watch the observed ratio approach the theoretical 3 : 1 as the sample grows.