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What are spores in plants?

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spores are produced in sporangium which is reproductive part of sporophyta. spores germinate and give rise to gametophyta producing gametes both male and female. A male gamete(sperm) unites with a female gamete(egg) giving rise to a zygote which has 2x number of chromosomrs. The two stages of plant life is clearly seen in bryophytes,pteridophytes. But in modern day angiosperms, the sporophyte part of life cycle is very much reduced