Is Euglena motile or nonmotile?
153037
They are Flagellates, meaning they have a large flagellum or whiplike cilium at one end, which propels them around. So yes, they are motile.
216940
Protoplasm can only be as high as the water meniscus pressure. I suppose it could be very large diameter, but not very thick. The cell is feed through osmosis from the arteries. I suppose with more capillaries feeding it there is no limit metabolically. If amoebas could not reproduce, fission, then would they get very big?
182868
Depends on the cell type labile, stable, non regenerative etc
40673
Surface tension, or the attraction of water molecules sideways and inwards at the surface of the water, cause water to act like an elastic trampoline. This lets the animal float without breaking the surface.\n\nTo propel itself forward, the insect's feet must push water backward (for every action of the bug there is an equal and opposite reaction on the water). The rowing action of the legs produces miniature vortices (whirlpools) which move backward from the bug's feet.
1150910
Cytoplasmic streaming is the flowing of cytoplasm in eukaryotic cells. This occurs in both plant and animal cells. It creates cytoplasmic reorganization during cell reproduction. In unicellular organisms such as amoeba, it provides the mechanism for cell locomotion. It aids in the delivery of nutrients, metabolites, and genetic information to all parts of larger plant cells. It vigorously "stirs" these components about the cytoplasm. As membrane-bound organelles crawl along the inner cell wall they set the cytoplasm into motion. This streaming allows other organelles and nutrients to flow in the stream created. This allows the components of the cell to flow around the cell and balance the amount of nutrients that exist in different parts of the cell providing nutrients and enzymes, as well as a means of motion for unicellular eukaryotes, like amoeba. Actin filaments play a role in streaming.\nCytoplasmic streaming is a process found in many plant cells that moves large quantities of cytoplasm (including organelles) around the cell. This phenomenon is most pronounced in larger, highly vacuolated cells and is generally assumed to allow for efficient mixing and distribution of solutes. Cytoplasmic streaming has been studied extensively in internodal cells of characean algae (Kuroda, 1990; Shimmen and Yokota, 1994). It usually is driven by the acto-myosin system, although instances of microtubule-based organelle movement have been described (e.g. Mizukami and Wada, 1981; Mineyuki and Furuya, 1986). Studies of streaming events in the past have relied on visualization of moving organelles with phase-contrast or Nomarski microscopy. The nature of the organelles was therefore mostly unknown. The participation of Golgi vesicles in cytoplasmic streaming was inferred based only on the effects of inhibitor studies (e.g. Mollenhauer and Morré, 1976).It also has been proposed that entire Golgi stacks might participate in the streaming motion (Staehelin and Moore, 1995). This postulated movement of Golgi stacks has recently been demonstrated in tobacco (Nicotiana clevelandii) leaf epidermal cells by means of green fluorescent protein (GFP) transiently expressed in the Golgi as a fusion with the targeting domain of mammalian sialyltransferase (Boevink et al., 1998). Golgi stack movement may also provide the mechanism responsible for their dispersed distribution throughout the cytoplasm. At the same time, this movement imposes additional constraints on the possible mechanisms for transport to and from the Golgi.
609692
No. All motion is "Forward". Right down to the tiniest Particle. It can be pushed but not pulled. No matter the direction.
794621
I believe, that you are looking for amoeba.\nAmoeba's are from the kingdom: Zooplankton,  which has animal like characteristics. The Amoeba, in particular, belongs to the phylum: sarcodina which have characteristics such as having a coinceboid shape (no shape), and being able to flow by extending it's cell membrane to form false feet (pseudopod).\n\nBut, there are still several others that can be classified in this category: Paramecium cordatum (from the phylum: ciliophora), Trypanosoma gambiensis (from the phylum: mastigophora), and Plasmodium vivox (from the phylum: sporozoa)\nAs you see, there is more then one choice in this matter.\n\nHope this helps!
604267
Zoomastigina is sometimes considered a Phylum of Protozoan unicellular critters.\n\nThey are generally flagellate critters that do not photosynthesize.\n\nThat's about all I know, sorry.
852398
They have a single "foot" to help move.\nThey move on the same theory as jet propulsion.\nThey can create a web like structure to secure them to rocks, pipes, etc.\nThey have a "tongue" that can absorb their nutrients from the water.\nThey need both males and females to reproduce.  They eject their sperm in the water, the females get fertile this way.\n\nIn other words, for simple "looking" organisms they rock.
964752
The first three are correct.  I am having difficult finding an organism that is not somehow connected to an energy source.
162063
the end of a cell. It is used for locomotion of the cell
505659
That is xylem.\nPhloem transports manufactured materials, e.g. sugars.\nLook here:
689653
amoeba\nand i think cynobacteria \neuglena might be not, but im not sure
481712
I believe you are speaking of the euglenids; they are the other dominant member of the group that contains the kinetoplastida, the Euglenozoa, and are characterized by unique proteinaceous strips beneath their cell membranes that give them rigid shapes; some feed using chloroplasts through photosynthesis, while others feed using phagocytosis or even pure osmosis. They live in fresh-water streams, particularly ones rich in minerals to feed upon.
531506
Wikipedia says that it is unknown whether mollusks  possess a eucoelom, they have a hemocoel to facilitate blood movement however.
1039611
Most phytoplankton, especially flagellate plant plankton, like dinoflaggelates, are possibly capable of using both sexual and non-sexual reproduction, but most use mitosis-asexual most the time. Depends on species, env factors, water conditions.
271331
not the smallest... but unicellular, euchariothic, living form. Reproduces by bipartition.