what are rotifers
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- Rotifers are small, mostly freshwater animals, and are amongst the smallest members of the Metazoa -- that group of multicellular animals which includes humans, and whose bodies are organized into systems of organs.delloid rotifers are the commonest variety found in fresh water. The term describes their habit of moving about by extending the body and attatching the head, then catching up with the foot and again extending the body -- bdelloid, like a leech.
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- Definition of CONIFER for Kids. : any of a group of mostly evergreen trees and shrubs (as pines) that typically produce cones and have leaves resembling needles or scales in shape.
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- Rotella T5 15W-40 is a semi-synthetic product formulated for heavy duty diesel engines. Rotella T3 NG 15W-40 is formulated specifically for use in natural gas fired engines. Rotella T3 15W-40 is the mainline product for heavy duty diesels.
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Chytridiomycota Chytridiomycota are unusual among the Fungi in that they reproduce with zoospores. For most members of Chytridiomycetes, sexual reproduction is not known. Asexual reproduction occurs through the release of zoospores (presumably) derived through mitosis.
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Introduction to the Rotifera Because of their very small size and mostly soft bodies, rotifers are not commonly favored for fossilization. Their only hard parts, their jaws, might be preserved in the fossil record, but their tiny size makes detection a serious challenge (Örstan, örstan). 1999ost species of rotifers are about 200 to 500 micrometers long. However a few species, such as Rotaria neptunia may be longer than a millimeter (Orstan 1999). Rotifers are thus multicellular creatures who make make their living at the scale of unicellular protists.
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Rotifer The rotifers (Rotifera, commonly called wheel animals) make up a phylum of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John Harris in 1696, and other forms were described by Antonie van Leeuwenhoek in 1703.otifers are an important part of the freshwater zooplankton, being a major foodsource and with many species also contributing to the decomposition of soil organic matter. Most species of the rotifers are cosmopolitan, but there are also some endemic species, like Cephalodella vittata to Lake Baikal.
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conifer Any of various trees or shrubs that bear cones. Conifers are dependent on the wind to blow pollen produced by the male cones to the female cones, where seeds develop.Conifers are usually evergreen, often have needle-shaped or scale-like leaves, and include the pine, fir, spruce, hemlock, and yew.See Note at pollination.. conifer-any gymnospermous tree or shrub bearing cones. coniferous tree. pine, pine tree, true pine-a coniferous tree. larch tree, larch-any of numerous conifers of the genus Larix all having deciduous needlelike leaves.
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- Rotifers serve as a food source for larger organisms, including other zooplankton. Most do not swim and must simply drift along with the water, as many plankton. do. But some species are better at moving themselves along than others. They. are very efficient reproducers and can multiply asexually in good conditions.
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The three major groups of freshwater zooplankton Rotifers (Phylum Rotifera). These are small zooplankton, typically 100 to 500 um (microns) in length, with two distinctive features. First, they have a ciliated region at the apical or head end called a corona.This is used for locomotion and for gathering of food particles from the water.otifers (Phylum Rotifera). These are small zooplankton, typically 100 to 500 um (microns) in length, with two distinctive features. First, they have a ciliated region at the apical or head end called a corona.
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Fungus A fungus (plural: fungi) is a kind of living organism: yeasts, moulds and mushrooms are types of fungi. The fungi are a separate kingdom of living things, different from animals and plants.Fungi have cells with nuclei.Their cell walls contain chitin, unlike the cell walls of plants, which contain cellulose. These and other differences show that the fungi form a single group of related organisms, called the Eumycota or Eumycetes.They share a common ancestor and are monophyletic group.ungi reproduce both sexually and asexually. Some fungi grow mushrooms: these are fruiting bodies. Under the cap there are gills; the gills bear spores that will disperse, and may develop into new fungi. Otherwise, fungi use a sporangium to bear asexual spores by mitosis, or sexual spores by meiosis.
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- Definition of CONIFER for Kids. : any of a group of mostly evergreen trees and shrubs (as pines) that typically produce cones and have leaves resembling needles or scales in shape. — co·nif·er·ous \kō-ˈni-fə-rəs, kə-\ adjective.
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What is a Pine Cone? A pine cone is an organ of the pine tree containing its reproductive structures. Pine trees are only one of the conifer, or cone-bearing, plants; others include cedars, firs, cypresses, and redwoods. Pine cones, like the reproductive organs of other conifers, come in male and female varieties. In most species of pine, male and female cones grow on the same tree. The trees of some species have cones predominantly of only one sex, with a few of the opposite sex. Pinus is a genus of trees with about 115 species.
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- Mycelium as seen under a log. Mycelium is the vegetative part of a fungus, consisting of a mass of branching, thread-like hyphae. The mass of hyphae is sometimes called shiro, especially within the fairy ring fungi.ycelium, like fungus, can be considered a mass noun, a word that can be either singular or plural. The term mycelia, though, like fungi, is often used as the preferred plural form. Sclerotia are compact or hard masses of mycelium.
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Conifers Conifers are one of the oldest groups of plants, with araucaria-like trees first appearing about 290 million years ago, and primitive representatives of most of the conifer families appearing during the Mesozoic era, from 230 to 68 million years ago.onifers are one of the oldest groups of plants, with araucaria-like trees first appearing about 290 million years ago, and primitive representatives of most of the conifer families appearing during the Mesozoic era, from 230 to 68 million years ago.
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Introduction to the Rotifera Rotifers: the wheel animalcules. Rotifers are microscopic aquatic animals of the phylum Rotifera. Rotifers can be found in many freshwater environments and in moist soil, where they inhabit the thin films of water that are formed around soil particles.ost species of rotifers are about 200 to 500 micrometers long. However a few species, such as Rotaria neptunia may be longer than a millimeter (Orstan 1999). Rotifers are thus multicellular creatures who make make their living at the scale of unicellular protists.
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Rotifers Rotifers are small (50-1000 µm) zooplankton that occur in freshwater, brackish, and marine environments.Rotifers feed on microalgae and are consumed by a wide variety of fish, shellfish, corals, and other organisms.otifers are small (50-1000 µm) zooplankton that occur in freshwater, brackish, and marine environments.
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Larch Larches are conifers in the genus Larix, in the family Pinaceae. Growing from 20 to 45 m tall (65 to 147 ft), they are native to much of the cooler temperate northern hemisphere, on lowlands in the north and high on mountains further south.arch is used as a food plant by the larvae of a number of Lepidoptera species—see list of Lepidoptera that feed on larches. Siberian larch. Male (above) and female (below right) cones of Japanese Larch emerging in spring.
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Apicomplexa The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic protists. Most of them possess a unique form of organelle that comprises a type of plastid called an apicoplast, and an apical complex structure. The organelle is an adaptation that the organism applies in penetration of a host cell.he Apicomplexa are unicellular and spore-forming. All species are obligate endoparasites of animals, except Nephromyces, a symbiont in marine animals, originally classified as a chytrid fungus. Motile structures such as flagella or pseudopods are present only in certain gamete stages.
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rota Definition of rota. 1  1 capitalized [Medieval Latin, from Latin] : a tribunal of the papal curia exercising jurisdiction especially in matrimonial cases appealed from diocesan courts. 2  2 chiefly British a : a fixed order of rotation (as of persons or duties)b : a roll or list of persons : roster.
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- Definition of CONIFER for Kids. : any of a group of mostly evergreen trees and shrubs (as pines) that typically produce cones and have leaves resembling needles or scales in shape.— co·nif·er·ous \kō-ˈni-fə-rəs, kə-\ adjective. any of an order (Coniferales) of mostly evergreen trees and shrubs having usually needle-shaped or scalelike leaves and including forms (as pines) with true cones and others (as yews) with an arillate fruit. — co·nif·er·ous \kō-ˈni-f(ə-)rəs, kə-\ adjective.
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Pine Pines are gymnosperms. 1  The genus is divided into three subgenera, which can be distinguished by cone, seed, and leaf characters: 2  Pinus subg. Pinus, the yellow, or hard pine group, generally with harder wood and two or three needles per fascicle. 3  Pinus subg. Ducampopinus, the foxtail or pinyon group. 4  Pinus subg.
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Rotifer Most species of the rotifers are cosmopolitan, but there are also some endemic species, like Cephalodella vittata to Lake Baikal. Recent barcoding evidence, however, suggests that some 'cosmopolitan' species, such as Brachionus plicatilis, B. calyciflorus, Lecane bulla, among others, are actually species complexes.he most distinctive feature of rotifers is the presence of a ciliated structure, called the corona, on the head. In the more primitive species, this forms a simple ring of cilia around the mouth from which an additional band of cilia stretches over the back of the head.
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- Definition of Porifera : a phylum of primitive invertebrate animals comprising the sponges and having a cellular grade of construction without true tissue or organ formation but with the body permeated by canals and chambers through which a current of water flows and passes in its course through one or more cavities lined with choanocytes
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Pinophyta The conifers are an ancient group, with a fossil record extending back about 300 million years to the Paleozoic in the late Carboniferous period; even many of the modern genera are recognizable from fossils 60–120 million years old.ince most conifers are evergreens, the leaves of many conifers are long, thin and have a needle-like appearance, but others, including most of the Cupressaceae and some of the Podocarpaceae, have flat, triangular scale-like leaves.
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- The conifers, division Pinophyta, are one of 13 or 14 division level taxa within the Kingdom Plantae. They are cone-bearing seed plants with vascular tissue; all extant conifers are woody plants, the great majority being trees with just a few being shrubs. Typical examples of conifers are cedars, cypresses, douglas-firs, firs, junipers, kauris, larches, pines, redwoods, spruces, and yews. This category has the following 6 subcategories, out of 6 total. ► Conifer genera‎ (2 C, 22 P) ► Conifer pathogens and diseases‎ (1 C, 3 P)
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rotifer Check your grammar now! : any of a class (Rotifera of the phylum Aschelminthes) of minute usually microscopic but many-celled chiefly freshwater aquatic invertebrates having the anterior end modified into a retractile disk bearing circles of strong cilia that often give the appearance of rapidly revolving wheels.