Levels of biological organization

BiologyCell BiologyAges 15–16

Zoom continuously from molecules up to the biosphere: molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere. Each level is redrawn with its characteristic size in meters, a real-world example, and key features; the four basic levels of living organization (cell, organism, population, community–ecosystem) are marked separately. Drag the level slider or tap the scale on the right to jump to any level, or let it auto-play through a full cycle in about ten seconds.