Gymnosperms Life Cycle
Bryophytes are seedless plants without specialized water conducting tissues. A pteridophyte is a vascular plant with xylem and phloem that disperses spores.
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Gymnosperms meaning naked seeds are seed bearing plants that dont produce flowers instead they have male and female reproductive organs mostly in the form of cones.
Gymnosperms life cycle.
Gymnosperms and angiosperms.
Male cones contains the pollen grain which is the male gametophyte.
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Ferns have vascular tissus in there stems but not in their hyphae or fronds.
Angiosperm life cycle summary.
Bryophytes include mosses phylum bryophyta liverworts phylum marchantiophyta hepatophyta and hornworts phylum anthocerophyta.
They require water for fertilization.
The sporophyte generation becomes dominant.
The gymnosperms also known as acrogymnospermae are a group of seed producing plants that includes conifers cycads ginkgo and gnetophytes.
Gymnosperms first evolved in paleozoic changes in the mesozoic made this their era dominant during this time were the ginkgo and cycads life cycle.
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Some flowers have both male and female parts some only have one type.
The term gymnosperm comes from the greek composite word gymnospermos gymnos gymnos naked and sperma sperma seed meaning naked seeds.
Because pteridophytes produce neither flowers nor seeds they are also referred to as cryptogams meaning that their means of reproduction is hidden.
Reproduction in angiosperms takes place in the flower on the sporophyte.
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