Gymnosperm life cycle.
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<Li> Sporophytes bear cones.
<Li> Pollen cones contain microsporangia.
<Li> Ovulate cones contain megasporangia.
<Li> After pollination, a megaspore develops into a female gametophyte.
<Li> The pollen grain germinates a sperm cell which fertilizes an egg.
<Li> The ovule becomes a seed.
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