bio lect 3 - bio lect 3: ferns and gymnosperms bryophytes:...

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bio lect 3: ferns and gymnosperms bryophytes: see lect 2, appressed to surface becasue no transport system. showed alternation of generations. A of G: sporophyte -> (meiosis) spres (N) -> gametophytes(N) -> gametes (N) -> fertilization [embryo (2N)] -> sporophyte both gametes and sporophytes are free living = undergo photosynthesis and make their own food. and can be similar or vary gametophyte: most of the green tissue of bryophyte. gametophyte is large, free living, and undergoes PS Sporophyte: not independent, generally not green and small. LC: Gametophyte; have both antheridium and archegonium male; sperm (antheridium for protection + dispersement) female; egg (archegonium for protection) sperm use water to swim to archegonium for fertilization. egg plus sperm on female gametophytes which makes embryo (2N). which grows on tip of moss to make sporophyte. Meiosis then occurs to make more spores to make more (n) gametophytes. have a water food transport system: vasular system 387MYA
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bio lect 3 - bio lect 3: ferns and gymnosperms bryophytes:...

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