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IBO · International Biology Olympiad

Biology olympiad practice.

Data-rich IBO-style questions on cells, genetics, physiology and ecology.

Tier
Topic

Feeder round

An enzyme and its look-alikeFeeder roundCell & molecular biology
Body colour and wing shape in fruit fliesFeeder roundGenetics & evolution
Oxygen bookkeeping in a cyclistFeeder roundAnimal physiology
Counting fish and weighing diversityFeeder roundEcology & behaviour

National final

Sun leaves and shade leavesNational finalPlant biology
Selection on an island populationNational finalGenetics & evolution
What the kidney clearsNational finalAnimal physiology
Counting steps on three treesNational finalBiosystematics

International

Mapping a plasmid by cutting itInternationalCell & molecular biology
Potentials across a nerve membraneInternationalAnimal physiology
A life table for a mountain lizardInternationalEcology & behaviour
Fungi, fertiliser and a fair testInternationalData analysis & experimental design