homo-heterosporous[1]

homo-heterosporous[1] - Are there risks (disadvantages) to...

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Bisexual Gametophyte MEIOSIS spores SYNGAMY zygote Diploid Haploid Male spores Haploid Female spores Homothallic Heterothallic MEIOSIS SYNGAMY zygote Diploid gametes + Male Gametophyte Female Gametophyte Female gametes Male gametes Sporophyte Sporophyte sporangium sporangium Homosporous Species • with one type of sporangium All non-vascular plants and many seedless vascular plants
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Male spores Haploid Female spores Heterothallic MEIOSIS SYNGAMY zygote Diploid Male Gametophyte Female Gametophyte Female gametes Male gametes Sporophyte Heterosporous Species • with two types of sporangium female sporangium male sporangium Some lycopods, water ferns and all seed plants
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How do these factors effect the biology of the organism? Are there benefits (adaptive advantages) to being homothallic?
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Unformatted text preview: Are there risks (disadvantages) to being homothallic? Are there benets (adaptive advantages) to being heterothallic? Are there risks (disadvantages) to being heterothallic? In the plant kingdom, meiosis results in the formation of spores . As you have seen, there are different ways to make spores: in one kind of sporangium homosporous in two kinds of sporangia heterosporous The spores germinate to re-establish the haploid gamete-forming generation gametophyte Depending on the species: the gametophyte may be bisexual homothallic the gametophytes may be unisexual heterothallic...
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homo-heterosporous[1] - Are there risks (disadvantages) to...

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