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    why is spirogyra called thallus?

    0  Views: 503 Answers: 1 Posted: 10 years ago

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    Algae are a group of photosynthetic plants.
    Most are aquatic.
    They have a basic structure called a thallus, i.e. the plant body is not divided into roots, stem and leaves.
    Within the group there is a great variety of size and structure from the single-celled Chlamydomonas to the giant seaweeds.
    We will look at three examples of algae:
    (a) The unicellular type - Chlamydomonas.
    (b) The filamentous type - Spirogyra.
    (c) The brown seaweed - Fucus vesiculosis.



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