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- Algae abstract "Algae (/ˈældʒiː/ or /ˈælɡiː/; singular alga /ˈælɡə/, Latin for "seaweed") are a very large and diverse group of eukaryotic organisms, ranging from unicellular genera such as Chlorella and the diatoms to multicellular forms such as the giant kelp, a large brown alga that may grow up to 50 meters in length. Most are autotrophic and lack many of the distinct cell and tissue types found in land plants such as stomata, xylem and phloem. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the Charophyta, a division of algae that includes Spirogyra and the stoneworts.There is no generally accepted definition of algae. One definition is that algae "have chlorophyll as their primary photosynthetic pigment and lack a sterile covering of cells around their reproductive cells". Other authors exclude all prokaryotes and thus do not consider cyanobacteria (blue-green algae) as algae.Algae constitute a polyphyletic group since they do not include a common ancestor, and although their plastids seem to have a single origin, from cyanobacteria, they were acquired in different ways. Green algae are examples of algae that have primary chloroplasts derived from endosymbiotic cyanobacteria. Diatoms are examples of algae with secondary chloroplasts derived from an endosymbiotic red alga.Algae exhibit a wide range of reproductive strategies, from simple asexual cell division to complex forms of sexual reproduction.Algae lack the various structures that characterize land plants, such as the phyllids (leaf-like structures) of bryophytes, rhizoids in nonvascular plants, and the roots, leaves, and other organs that are found in tracheophytes (vascular plants). Most are phototrophic, although some groups contain members that are mixotrophic, deriving energy both from photosynthesis and uptake of organic carbon either by osmotrophy, myzotrophy, or phagotrophy. Some unicellular species such as the green algae Prototheca and Helicosporidium, and many euglenids and dinoflagellates, have become heterotrophs, sometimes parasitic, relying entirely on external energy sources and have limited or no photosynthetic apparatus. Some other heterotrophic organisms, like the apicomplexans, are also derived from cells whose ancestors possessed plastids, but are not traditionally considered as algae. Algae have photosynthetic machinery ultimately derived from cyanobacteria that produce oxygen as a by-product of photosynthesis, unlike other photosynthetic bacteria such as purple and green sulfur bacteria. Fossilized filamentous algae from the Vindhya basin have been dated back to 1.6 to 1.7 billion years ago.".
- Algae thumbnail NSW_seabed_1.JPG?width=300.
- Algae wikiPageExternalLink cryptogamicbotan031880mbp.
- Algae wikiPageExternalLink main?stype=lite&keyword=algae&event=display&Submit=Go&start=1.
- Algae wikiPageExternalLink ?note_id=52.
- Algae wikiPageExternalLink www.algaebase.org.
- Algae wikiPageExternalLink index.html.
- Algae wikiPageExternalLink mflora.htm.
- Algae wikiPageExternalLink index.html.
- Algae wikiPageID "633".
- Algae wikiPageRevisionID "605846936".
- Algae date "March 2014".
- Algae domain Eukaryote.
- Algae excludes "* * Protista".
- Algae hasPhotoCollection Algae.
- Algae imageCaption "A variety of algae growing on the sea bed in shallow waters off the New South Wales coast".
- Algae imageWidth "263".
- Algae includes "* Archaeplastida ** Chlorophyta ** Rhodophyta ** Glaucophyta ** Charophyta * Rhizaria, Excavata ** Chlorarachniophytes ** Euglenids * Chromista, Alveolata ** Heterokonts *** Bacillariophyceae *** Axodines *** Bolidomonas *** Eustigmatophyceae *** Phaeophyceae *** Chrysophyceae *** Raphidophyceae *** Synurophyceae *** Xanthophyceae ** Cryptophyta ** Dinoflagellates ** Haptophyta *".
- Algae reason "meaning what exactly?".
- Algae subject Category:Algae.
- Algae subject Category:Endosymbiotic_events.
- Algae comment "Algae (/ˈældʒiː/ or /ˈælɡiː/; singular alga /ˈælɡə/, Latin for "seaweed") are a very large and diverse group of eukaryotic organisms, ranging from unicellular genera such as Chlorella and the diatoms to multicellular forms such as the giant kelp, a large brown alga that may grow up to 50 meters in length. Most are autotrophic and lack many of the distinct cell and tissue types found in land plants such as stomata, xylem and phloem.".
- Algae label "Alga".
- Algae label "Alga".
- Algae label "Alga".
- Algae label "Algae".
- Algae label "Alge".
- Algae label "Algen".
- Algae label "Algue".
- Algae label "Glony".
- Algae label "Водоросли".
- Algae label "طحالب".
- Algae label "藻類".
- Algae label "藻類".
- Algae sameAs Řasy.
- Algae sameAs Alge.
- Algae sameAs Φύκη.
- Algae sameAs Alga.
- Algae sameAs Alga.
- Algae sameAs Algue.
- Algae sameAs Alga.
- Algae sameAs Alga.
- Algae sameAs 藻類.
- Algae sameAs 조류_(수생_생물).
- Algae sameAs Algen.
- Algae sameAs Glony.
- Algae sameAs Alga.
- Algae sameAs m.0hlw.
- Algae sameAs Q37868.
- Algae sameAs Q37868.
- Algae wasDerivedFrom Algae?oldid=605846936.
- Algae depiction NSW_seabed_1.JPG.
- Algae isPrimaryTopicOf Algae.