Video encyclopedia



Algae Corner: What are Algae?


4 Ways Algae is Awesome


Understanding Algae


Attack of the killer algae - Eric Noel Muñoz



Algae is an informal term for a large, diverse group of photosynthetic organisms that are not necessarily closely related, and is thus polyphyletic. Included organisms range from unicellular microalgae genera, such as Chlorella and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to 50 m in length. Most are aquatic and autotrophic and lack many of the distinct cell and tissue types, such as stomata, xylem, and phloem, which are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the Charophyta, a division of green algae which includes, for example, Spirogyra and the stoneworts.
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    • Etymology and study 

    • Classification 

    • Relationship to land plants 

    • Morphology 

    • Physiology 

    • Symbiotic algae 

    • Lifecycle 

    • Numbers 

    • Distribution 

    • Ecology 

    • Cultural associations 

    • Uses