______ in zygote result in the formation of haploid spores.
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The haploid spores divide mitotically & form ______
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The dominant, photosynthetic phase in such plants is the free-living gametophyte. This kind of life cycle is termed as ______
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Many algae such as ______, Spirogyra and some species of Chlamydomonas represent this pattern
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On the other extreme, is the type wherein the diploid sporophyte is the dominant, photosynthetic, independent phase of the plant. The gametophytic phase is represented by the single to few-celled haploid gametophyte. This kind of life cycle is termed as ______ .
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An alga, ______ sp., represents this pattern In addition, all seed bearing plants i.e., gymnosperms and angiosperms, follow this pattern with some variations, wherein, the gametophytic phase is few to multi-celled.
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______ and pteridophytes, interestingly, exhibit an intermediate condition (Haplo-diplontic); both phases are multicellular. However, they differ in their dominant phases.
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A dominant, ______, photosynthetic, thalloid or erect phase is represented by a haploid gametophyte and it alternates with the short-lived multicelluler sporophyte totally or partially dependent on the gametophyte for its anchorage and nutrition. All ______ represent this pattern
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The diploid sporophyte is represented by a dominant, independent, photosynthetic, ______ It alternates with multicellular, saprophytic/autotrophic, independent but short-lived haploid gametophyte. Such a pattern is known as haplo-diplontic life cycle. All ______ exhibit this pattern
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Interestingly, while most algal genera are haplontic, some of them such as, ______, Polysiphonia, kelps are haplo-diplontic. Fucus, an alga is diplontic.
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______ contains protein besides starch.
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Bryophytes produce gametes, hence called ______
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The earliest system of classification used only ______ characters such as habit, colour, number & shape of leave, etc.
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Natural classification system uses not only the external features but also ______ feature like ______, anatomy, ______ & phytochemistry .
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______ that is based on ______ information like ______, structure, behaviour.
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