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Normally in gymnosperms how many archegonia are produced in an ovule ? a friend of mine has asked this question...

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Please find below the solution to the asked query:

 In gymnosperms, multiple archegonia are produced by the megagametophyte. This is one reason of polyembryony in gymnosperms as more than one egg may be fertilized in resulting in more than one embryo withing a single ovule.

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the functional megaspore is the first cell of the female gametophytic generation. the megaspore increases in size and its nucleus undergoes many free nuclear divisions producing about 2000 free nuclei . a vacuole appers in the center. later this vacuole disappears and wall formation starts centripetally thus by these divisions a multicellular tissue is differentiated . this is female prothallus or endosperm . near the micropylar end 1-5 archegonia are differentiated in the prothallus . each archegonium at maturity consists of 8 neck cells arranged in two tiers of four each and a venter having a small ventral canal cell and a large egg. hope you got it...:)
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thanks @Shreya for the Ans .Nd. thanku @Addu
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