enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Eyespot apparatus - Wikipedia

    en.wikipedia.org/wiki/Eyespot_apparatus

    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. It allows the cells to sense light direction and intensity and respond to it, prompting the organism to either swim towards the light (positive phototaxis ...

  3. Euglenid - Wikipedia

    en.wikipedia.org/wiki/Euglenid

    Eyespot, photoreceptor used to sense light direction and intensity; Contractile vacuole, regulates the quantity of water inside a cell; Ventral flagellum; Ventral root; Golgi apparatus; modifies proteins and sends them out of the cell; Endoplasmic reticulum, the transport network for molecules going to specific parts of the cell; Phagosome

  4. Evolution of the eye - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_the_eye

    They are insufficient for vision, as they cannot distinguish shapes or determine the direction light is coming from. Eyespots are found in nearly all major animal groups, and are common among unicellular organisms, including euglena. The euglena's eyespot, called a stigma, is located at its anterior end. It is a small splotch of red pigment ...

  5. Euglena gracilis - Wikipedia

    en.wikipedia.org/wiki/Euglena_gracilis

    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.

  6. Euglenales - Wikipedia

    en.wikipedia.org/wiki/Euglenales

    Euglenales consists mostly of freshwater organisms, in contrast to its sister Eutreptiales which is generally marine. Cells have two flagella, but only one is emergent; the other is very short and does not emerge from the cell, so cells appear to have only one flagellum. [3]

  7. Euglenaceae - Wikipedia

    en.wikipedia.org/wiki/Euglenaceae

    Euglenaceae show the most morphological diversity within the class Euglenophyceae. [3] They are mostly single-celled organisms, except for the genus Colacium.They are free-living or sometimes inhabiting the digestive tracts of animals. [1]

  8. Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  9. Trachelomonas - Wikipedia

    en.wikipedia.org/wiki/Trachelomonas

    Trachelomonads also have an eyespot, a feature of photosynthetic euglenoids, located outside the chloroplast with orange to red pigmentation. [8] These cells also have one long emergent flagellum that has previously been identified to emerge from the apical pore, and a shorter flagellum that is within the furrow and not used for motility.