Euglena has a 'sensory structure'. Why is this structure so important to this protist?
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Think I found the answer on-line, quoting:\n"It also has a red eyespot. Euglena gracilis uses its eyespot to locate light. Without light, it cannot use its chloroplasts to make itself food."\n\nfrom the site: http://www.fcps.edu/StratfordLandingES/Ecology/mpages/euglena.htm\n\nhope that helps
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It is very simple. Last band gives you that answer. You need to see G=G bond and it is follow by TAG. It is definatly eukaryotic.
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Lol. I did this for homework once. Ok ok ok. I'll help yah out since i'm a pretty cool chickk. I'm not going to spend all day rewording these for you so you're going to have to do that part yourself, k?♥\n\nMitochondria: \nMitochondria are the cells' power sources. They are distinct organelles with two membranes. Usually they are rod-shaped, however they can be round. The outer membrane limits the organelle. The inner membrane is thrown into folds or shelves that project inward. These are called "cristae mitochondriales".\n\nChloroplast:\nA green structure, or organelle, contained in the cytoplasm of plant cells. Chloroplasts are reponsible for the green color of almost all plants and are lacking only in plants that do not make their own food, such as fungi and nongreen parasitic or saprophytic higher plants. The chloroplast is generally flattened and lens-shaped and consists of a body, or stroma, in which are embedded from a few to as many as 50 submicroscopic bodies–the grana–made up of stacked, disklike plates. The chloroplast contains chlorophyll pigments, as well as yellow and orange carotenoid pigments. Chloroplasts are thus the central site of the photosynthetic process in plants. The chloroplasts of algae are simpler than those of higher plants and may contain special, often conspicuous, starch-accumulating structures called pyrenoids.\n\nGolgi Apparatus:\nThe Golgi apparatus (also called a Golgi body, Golgi complex, or dictyosome) is an organelle found in most eukaryotic cells, including those of plants, animals, and fungi. The name comes from Italian anatomist Camillo Golgi, who identified it in 1898. The primary function of the Golgi apparatus is to process proteins targeted to the plasma membrane, lysosomes or endosomes, and those that will be formed from the cell, and sort them within vesicles. Thus, it functions as a central delivery system for the cell. It is part of the endomembrane system.\n\nRough&Smooth Endoplasmic Reticulum:\nThe endoplasmic reticulum or ER (endoplasmic means "within the cytoplasm," reticulum means "little net") is an organelle found in all eukaryotic cells. It is part of the endomembrane system. The ER modifies proteins, makes macromolecules, and transfers substances throughout the cell. Prokaryotic organisms do not have membranous organelles and thus do not have an ER. The basic structure and composition of the ER is similar to the plasma membrane, although it is actually an extension of the nuclear membrane. The ER is the site of the translation, folding, and transport of proteins that are to become part of the cell membrane (e.g., transmembrane receptors and other integral membrane proteins) as well as proteins that are to be secreted or "exocytosed" from the cell (e.g., digestive enzymes).\n\n*The ER consists of an extensive membrane network of tubes and cisternae (sac-like structures) held together by the cytoskeleton.\n\nRough ER:\nThe rough ER, also called granular ER or ergastoplasm (acronyms rER or gER) manufactures and transports proteins destined for membranes and secretion. It is called "rough" because ribosomes present on the cytosolic side of the membrane give it a rough appearance.\n\nSmooth ER:\nThe smooth ER (also known as agranular ER or aER) has functions in several metabolic processes, including synthesis of lipids, metabolism of carbohydrates, and detoxification of drugs and poisons. Enzymes of the smooth ER are important to the synthesis of lipids, including phospholipids and steroids. Among the steroids produced by smooth ER are the sex hormones of vertebrates and the various steroid hormones secreted by the adrenal glands. The cells that actually synthesize and secrete these hormones - in the testes and ovaries, for example - are rich in the smooth ER.\n\nRibosomes:\nRibosomes are responsible for assembling the proteins of the cell. Ribosomal subunits are synthesized by the nucleolus. Depend
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Actually, sponges are mostly colonial. They belong to Pylum Porifera and are almost exclusively marine.  Many smaller individuals group together and partner to form the structures you see and function as a unit. There are species which are solitary. Solitary sponges and colonies range in diameter from about 1/2 in. to 5 ft (1–150 cm) and vary greatly in shape. Some are branched, some more or less globular, and some are thin encrustations on rocks and pilings.\nPoriferans  are one of the simplest multi-cellular animals. 98% of this phylum consists of marine species. They have a cellular level of organization, without any organs or tissues. Sponges consist of several different cell types, each specialized for a different purpose and all working independently of one another. Canals run throughout the body of the sponge, cycling through water for feeding, gamete dispersal, waste disposal, and gas exchange. Colonial sponges often have many small ostia (inflow; sing. ostium) and share one large osculum (outflow; pl. oscula). Structure is present in the form of calcium carbonate or silica spicules embedded in a gelatinous mesohyl layer. Also embedded in the mesohyl are unspecialized cells called archaeocytes. Archaeocytes perform various functions, including: intracellular digestion, gamete production, and waste elimination. Sponges also have the amazing ability to self-recognize and reform if broken apart; archaeocytes are thought to function in this as well. Flagellated cells, called choanocytes or collar cells, create water flow as well as capture small food particles and incoming sperm. Sponges are divided into three classes, distinguished by differences in structure: Demospongiae (like your common bath sponge), Calcarea, and Hexactinallida. They are also divided into functional groups based on form complexity.\n\nSo the answer is really BOTH.
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I don't think so becasue prokaryotes means ''primitive cell'' so eukaryotes come form themm they are ''true cells''. \n\n2. electorn microscoep,- advantges: 3d images, very high resolution.\ndisadvanteges: long time to prepare sample, sample most be dead, electron micrsocope are expensive, and the images are in black and white.\n\n I you want to know how a susbtance enters a cells is better with a light microscope because you cant have a life cell. but i think you could still study it with electron. But take in consideration that disavantages i told you.
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I don't think there is such a structure.  The basidia which bear the basidiospores are found on the gill surfaces.  I think the only thing separating them is space.
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The mouth, located at the center of one end of the body, opens into a gastrovascular cavity, which is used for digestion and distribution of food; an anus is lacking.\nAn evolutionary advance the Cnidarians have over sponges is extracellular \ndigestion of food. What this means is Cnidarians actually have a special \ngut cavity for digestion of captured food, rather than allowing each cell \nto do it, like a sponge does. All animals from Cnidarians up have kept \nthis feature! It's very important and allows the animal to be much more \nefficient.\n\nCnidarians (and Hydra) have a gut cavity with only a single opening. \nDigestive enzymes are released from the gut wall and help in the break-\ndown of the food. Once the food has been broken up into smaller particles, \ncells from the gut wall start engulfing the bits using the \nprocess "phagocytosis" (the same way an amoeba feeds).\n\nThe incredible thing about Cnidarian digestion is that when they arose, \nthey were the first animal ever to be able to eat and successfully digest \na piece of food LARGER that itself (although only small pieces by small \npieces).
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Check for the optimum texture and pH for the grass.\n\n\nFor the amoeba,i guess it is contractile vacuole.
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http://www.seedbiology.de/structure.asp
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Just going with what Jag said, there doesn't seem to be any correct answer.\n\nAnimalia are never photosynthetic.\n\nEubacteria are never eukaryotes.\n\nFungi are never photosynthetic.\n\nPlantae are never single celled.\n\nNone of the answer is correct. In point of fact most single-celled eukaryotes that are either heterotrophic or photosynthetic belong to the kingdom Protista. But Protista isn't one of the options given.\n\nI think your teacher stuffed up the question.
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1.\n\n\n\n\n\n\n2. Viruses are neither unicellular nor multicellular organisms; they are somewhere between being living and non-living. Viruses have genes and show inheritance, but are reliant on host cells to produce new generations of viruses. Many viruses have similarities to complex molecules. Because viruses are dependent on host cells for their replication they are generally not classified as "living". Whether they are "alive", they are obligate parasites, and have no form which can reproduce independently of their host. Like most parasites, they have a specific host range, sometimes specific to one species (or even limited cell types of one species) and sometimes more general.\n\n3. protozoa and algae. I don't know why\n\n4. The protozoa are mostly single-celled, motile, and feed by phagocytosis, though there are numerous exceptions. They are usually only 0.01-0.5 mm in size, generally too small to be seen without a microscope. They are ubiquitous throughout aqueous environments and the soil, commonly surviving dry periods as cysts or spores, and include several important parasites. Based on locomotion, protozoa are grouped into:\n\nFlagellates with long flagella  -like Euglena\nAmoeboids with transient pseudopodia   -like Amoeba\nCiliates with multiple, short cilia    -Paramecium\nSporozoa non-motile parasites; form spores like Plasmodium.\n\n\n\n5. The algae gather light energy through photosynthesis. They include many single-celled creatures that are also considered protozoa, such as Euglena and Paramecium bursaria, which have acquired chloroplasts through secondary endosymbiosis. Others are non-motile, and some are truly multicellular, including some members of the following groups:\nChlorophytes green algae, related to higher plants  -like Ulva\nRhodophytes red algae  -like Porphyra\nHeterokontophytes brown algae, diatoms, etc.  -like Macrocystis\n\nThe green and red algae, along with a small group called the glaucophytes, appear to be close relatives of other plants, and so some authors treat them as Plantae despite their simple organization. Most other types of algae, however, developed separately. They include the haptophytes, cryptomonads, dinoflagellates, euglenids, and chlorarachniophytes, all of which have also been considered protozoans.\n\n\n6.\n\n\n\n\n\n\n7.\n\n\n\n\n\n\n8. hyphae is any of the threadlike filaments forming the mycelium of a fungus. Hyphae is a long, branching filament that, with other hyphae, forms the feeding thallus of a fungus called the mycelium. Hyphae are also found enveloping the gonidia in lichens, making up a large part of their structure. A typical hypha consists of a tubular wall, usually made of chitin, which surrounds, supports, and protects the cells that compose a hypha. For most fungi, a cell within a hyphal filament is separated from other cells by internal cross-walls called septa (singular septum).\n\nSome forms of parasitic fungi have a portion of their hyphae modified to form haustoria that are able to penetrate the tissues of a host organism. Similar, yet mutualistic forms of penetrating hyphae are called mycorrhizae and are important in assisting nutrient and water absorption by plants.\n\n\n\n9. \n\n\n\n\n\n\n\n\n10. Lichen is a fungus, usually of the class Ascomycetes, that grows symbiotically with algae, resulting in a composite organism that characteristically forms a crustlike or branching growth on rocks or tree trunks.
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Both being unicellular (no matter what anybody said), and generally autotrophic organisms... All protists are unicellular, and not all algae belong to Regnum Protista... Place of algae in Whittaker's 5 Regnums is not well explained, and multicellular algae belong to Regnum Plantae... If someone has better idea where to classify them they could make a career out of it...\nBut remember, most people still divide all the organisms into 2 Regnums: plants and animals...
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Taking a stab at it...I think it's C.  \n\nFrom what I can remember, during the life cycle of a slime mold, it begins as a large unicellular organism that eventually aggregates with surrounding cells to produce smaller individual organisms that are a part of a larger multicellular organism.
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Archaea, Eukaryota and Bacteria are the fundamental classifications in what is called the three-domain system. Like bacteria, Archaea are single-celled organisms lacking nuclei and are therefore prokaryotes, classified as Monera in the alternative six-kingdom taxonomy. They were originally described in extreme environments, but have since been found in all types of habitats.\n\nThe archaeal lipids are unique because the stereochemistry of the glycerol is the reverse of that found in bacteria and eukaryotes. This is strong evidence for a different biosynthetic pathway. \nMost bacteria and eukaryotes have membranes composed mainly of glycerol-ester lipids, whereas archaea have membranes composed of glycerol-ether lipids. Even when bacteria have ether-linked lipids, the stereochemistry of the glycerol is the bacterial form. These differences may be an adaptation on the part of Archaea to hyperthermophily. However, it is worth noting that even mesophilic archaea have ether-linked lipids. \nArchaeal lipids are based upon the isoprenoid sidechain. This is a five-carbon unit that is also common in rubber and as a component of some vitamins common in bacteria and eukaryotes. However, only the archaea incorporate these compounds into their cellular lipids, frequently as C-20 (four monomers) or C-40 (eight monomers) side-chains. In some archaea, the C-40 isoprenoid side-chain is actually long enough to span the membrane, forming a monolayer for a cell membrane with glycerol phosphate moieties on both ends.
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I really wish people who don't have a clue what they're talking about would stop taking guesses at the answer.\n\nAmoebae are EUKARYOTIC. \n\nThe cell contains a nucleus doesn't it? That is the definting characteristic of a eukaryote cell.\n\nDemeter actually posted a link to a website which states that amoeba is a eukaryote...... and then said that it was a prokaryote.\n\nDum dum dum dum dum.
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Your question has a number of difficult aspects to it, but I have asked a friend of mine to help me do some research into the answer for you and I think he has included a great number of pieces of information that you may find interesting.\nHere is what I eventually decided was the most productive answer to give you. I hope it helps you out! (after all, it is 99% his answer I have included below. He generally gives me such good feedback that I try to quote him directly as much as possible.)\nHere we go: An animal is:\nAn organized living being endowed with sensation and the power of voluntary motion, and also characterized by taking its food into an internal cavity or stomach for digestion; by giving carbonic acid to the air and taking oxygen in the process of respiration; and by increasing in motive power or active aggressive force with progress to maturity.\nOR:\nAny of a kingdom (Animalia) of living things including many-celled organisms and often many of the single-celled ones (as protozoans) that typically differ from plants in having cells without cellulose walls, in lacking chlorophyll and the capacity for photosynthesis, in requiring more complex food materials (as proteins), in being organized to a greater degree of complexity, and in having the capacity for spontaneous movement and rapid motor responses to stimulation" These are the animal subkingdoms, and the principal classes under them:\n* Vertebrata, including Mammalia or Mammals, Aves or Birds, Reptilia, Amphibia, Pisces or Fishes, Marsipobranchiata (Craniota); and Leptocardia (Acrania).\n* Tunicata, including the Thaliacea, and Ascidioidea or Ascidians.\n* Articulata or Annulosa, including Insecta, Myriapoda, Malacapoda, Arachnida, Pycnogonida, Merostomata, Crustacea (Arthropoda); and Annelida, Gehyrea (Anarthropoda).\n* Helminthes or Vermes, including Rotifera, Ch�tognatha, Nematoidea, Acanthocephala, Nemertina, Turbellaria, Trematoda, Cestoidea, Mesozea.\n* Molluscoidea, including Brachiopoda and Bryozoa.\n* Mollusca, including Cephalopoda, Gastropoda, Pteropoda, Scaphopoda, Lamellibranchiata or Acephala.\n* Echinodermata, including Holothurioidea, Echinoidea, Asterioidea, Ophiuroidea, and Crinoidea.\n* Coelenterata, including Anthozoa or Polyps, Ctenophora, and Hydrozoa or Acalephs.\n* Spongiozoa or Porifera, including the sponges.\n* Protozoa, including Infusoria and Rhizopoda.
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I think you're off...sorry. Caffeine accelerates metabolism of animals that have nervous system. It doesn't affect the cells, it affects the nervous system that controls the metabolic rate of, for example, mammals. It works pretty much teh same way as adrenaline.\nOn the other hand, euglena cysts don't have reduce metabolic rate: the dont have ANY metabolism going on. They're just a mass of molecules disposed in a perfect way that when triggered by the environmental condition, they start  working. Like a car motor. To do this, the euglena must in fact be very metabolically active in order to produce a lot of stuff and make a lot of changes to prepare for cysting. The stimuly are very specific: water and glucose. (and lack of water or glucose to form teh cyst). So i doubt that caffeine will affect, unless you put so much into the water that it becomes a poison, in which condition it may form a cyst (not by affecting the metabolic rate though)\nYou migh want to rethink your project and try to find out how much caffeine is pisonous for euglena and can it form cyst to protect itsefl from this condition?\nThe other thing about working with petri dishes: If it's a solid medium, nutrients will probably drop dow very fast, in which condition the euglena will form cysts. You won't be able to know how much the lack of nutrients made it unvulnerable to caffeine. Try to use a system that is more stable, like liquid medium, in which you can somehow trigger a cyst forming event. That way you will have more control.\nGood luck