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  2. Spirogyra - Wikipedia

    en.wikipedia.org/wiki/Spirogyra

    Spirogyra (common names include water silk, mermaid's tresses, and blanket weed) is a genus of filamentous charophyte green algae of the order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is characteristic of the genus. Spirogyra species, of which there are more than 500, are commonly found in freshwater ...

  3. Eyespot apparatus - Wikipedia

    en.wikipedia.org/wiki/Eyespot_apparatus

    Schematic representation of a Euglena cell with red eyespot (9) Schematic representation of a Chlamydomonas cell with chloroplast eyespot (4). The eyespot apparatus (or stigma) is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids.

  4. Zygnematophyceae - Wikipedia

    en.wikipedia.org/wiki/Zygnematophyceae

    Members of the Zygnematophyceae are common in nearly all freshwater habitats, particularly filamentous genera such as Spirogyra and Mougeotia. Some Spirogyra species can tolerate disturbed habitats. On the other hand, desmids (the Desmidiales) often prefer bogs, peatlands, and lakes. [17]

  5. Green algae - Wikipedia

    en.wikipedia.org/wiki/Green_algae

    Haploid algal cells (containing only one copy of their DNA) can fuse with other haploid cells to form diploid zygotes. When filamentous algae do this, they form bridges between cells, and leave empty cell walls behind that can be easily distinguished under the light microscope. This process is called conjugation and occurs for example in Spirogyra.

  6. Archaeplastida - Wikipedia

    en.wikipedia.org/wiki/Archaeplastida

    The Archaeplastida (or kingdom Plantae sensu lato "in a broad sense"; pronounced / ɑːr k ɪ ˈ p l æ s t ɪ d ə /) are a major group of eukaryotes, comprising the photoautotrophic red algae (Rhodophyta), green algae, land plants, and the minor group glaucophytes. [6]

  7. Alternation of generations - Wikipedia

    en.wikipedia.org/wiki/Alternation_of_generations

    The haploid prothallus does not resemble the sporophyte, and as such ferns and their allies have a heteromorphic alternation of generations. The prothallus is short-lived, but carries out sexual reproduction, producing the diploid zygote that then grows out of the prothallus as the sporophyte.

  8. Spirogyra elegans - Wikipedia

    en.wikipedia.org/wiki/Spirogyra_elegans

    Spirogyra elegans is a species of green algae in the family Zygnemataceae. [1] References External links. Data related to Spirogyra elegans at Wikispecies ...

  9. Taxonomy of Protista - Wikipedia

    en.wikipedia.org/wiki/Taxonomy_of_Protista

    A protist (/ ˈ p r oʊ t ɪ s t /) is any eukaryotic organism (one with cells containing a nucleus) that is not an animal, plant, or fungus.The protists do not form a natural group, or clade, since they exclude certain eukaryotes with whom they share a common ancestor; [a] but, like algae or invertebrates, the grouping is used for convenience.