In ferns, as in almost all higher spore plants, reproduction is divided into two stages, which are repeated one after the other and are interconnected. It happens like this:
1. Adult fern without sex produces spores;
2. Ripe spores, falling into a favorable environment, give rise to the sexual stage of reproduction;
3. Plants of different sexes emerge from the spores, which soon unite by accretion and from them a ready sexless fern is formed, ready to give the next set of spores.
Then this whole cycle is repeated.
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