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Later, various biologists described additional characteristics for Euglena and established different classification systems for euglenids based on nutrition modes, the presence and number of flagella, and the degree of metaboly.
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Euglena - schéma de structure 1 noyau 2 chloroplastes 3 granules de paramylon (réserve énergétique proche de l'amidon) 4 vacuole contractile (système de régulation osmotique) 5 kinétosome 6 réservoir 7 flagelle court 8 capteur de lumiere (oeil rudimentaire) 9 stigma ("cache" pour le capteur de lumière permettant de connaitre l ...
Euglena is a genus of single cell flagellate eukaryotes. It is the best known and most widely studied member of the class Euglenoidea , a diverse group containing some 54 genera and at least 200 species.
Euglena gracilis is a freshwater species of single-celled alga in the genus Euglena. It has secondary chloroplasts , and is a mixotroph able to feed by photosynthesis or phagocytosis . It has a highly flexible cell surface, allowing it to change shape from a thin cell up to 100 μm long to a sphere of approximately 20 μm.
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Peranema's basic anatomy is that of a typical euglenid. The cell is spindle or cigar-shaped, somewhat pointed at the anterior end. It has a pellicle with parallel finely-ridged proteinaceous strips underlain by microtubules arranged in a helical fashion around the body. With this type of pellicle, which is shared by many euglenids, the ...