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Gymnosperms
. Gymnosperms are heterosporous, producing two kinds of spores microspores and megaspores produced by separate sporangia. The two types of sporangia - microsporangia and megasporangia are found on special leaf like structures called sporophylls. The microsporangia represent the pollen sac..
Division Gymnospermae
Pinus Gymnosperms are intermediate between cryptogams and angiosperms. The male flower is a cone which produces pollen. The female flower is much larger and consists of a rosette of carpels which bear ovules along the two margins. Example: Cycas, Pinus and Coniferous tre..
Pinus Gymnosperms are intermediate between cryptogams and angiosperms. The male flower is a cone which produces pollen. The female flower is much larger and consists of a rosette of carpels which bear ovules along the two margins. Example: Cycas, Pinus and Coniferous tre..Summary
>The gametophyte, which is called prothallus contains anteridia and archegonia which produce sperms and egg respectively. The zygote formed from fertilization develops into a sporophyte. Gymnosperms are a group of advanced plants which produce seeds that are not enclosed in fruits. Hence,..
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