Biology · At your own pace

Life Cycles

Build a life cycle, then follow one generation into the next.

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How to play

Choose a picture, read its clue, then choose a numbered space. Start with the egg or seed and arrange the stages of development. Select a placed picture to move it; occupied spaces swap. Check your cycle, correct it or use a hint. After completion, use Follow the cycle to explore each stage and the next generation. Undo, clear and saved progress are available. Use Tab and Enter, or select a picture and press a number key for its space. These are simplified development diagrams, not a timeline or a scale drawing.

Butterfly

Egg → Caterpillar → Pupa → Adult butterfly

A simplified cycle of complete metamorphosis. Stage lengths and sizes are not shown.

Smithsonian: Butterflies and Beyond

Green and golden bell frog

Egg → Tadpole → Metamorph → Adult frog

Litoria aurea. This species has a tadpole stage; not every frog species follows this pattern.

Australian Museum: Green and Golden Bell Frog Life cycle · Australian Museum: Frog life cycle

Flowering plant

Seed → Seedling → Growing plant → Flower → Fruit with seeds

A simplified seed-to-seed cycle of a flowering plant. Plants can also reproduce in other ways.

Kew: What is a seed? · Kew: Plant reproduction

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