• a) Blue-green algae (b) Saprophytic fungi (c) Archaebacteria (d) Eubacteria. (recruitmenttopper.com)
  • All organisms with prokaryotic cells are assigned to Kingdom Fungi. (easynotecards.com)
  • As you are studying groups of fungi and fungi-like organisms, you encounter a specimen that does NOT have chitin in its cell wall.To which group does this specimen belong? (easynotecards.com)
  • In the last decades, the interest in bioactive compounds derived from natural sources including bacteria, fungi, plants, and algae has significantly increased. (bvsalud.org)
  • The membrane-bound fatty acid desaturases, which include Δ5-, Δ6-, Δ9-, Δ12- and Δ15-desaturase in the mammals, fungi, insects, higher plants and cyanobacteria, use fatty acids esterified to complex lipid as the substrate, and use cytochrome (cyt) b5 oxidoreductase and cyt b5 as electron donors. (springeropen.com)
  • [14] The coralline algae , which secrete calcium carbonate and play a major role in building coral reefs , belong here. (wikipedia.org)
  • Crustose coralline algae (CCA) are major benthic calcifiers that play crucial roles in marine ecosystems, particularly coral reefs. (peerj.com)
  • Many red algae are known for their unique calcified structures, such as coralline algae, which play a key role in building and maintaining coral reefs. (maritimepage.com)
  • Red algae are protists or microscopic organisms in the phylum Rhodophyta, and range from simple one-celled organisms to complex, multi-celled organisms. (agcommercialloan.com)
  • Economic importance of Algae These eukaryotic marine organisms have no roots, flowers and stem. (rhas.ca)
  • Amazingly algae is being tested as a bio-fuel and as a bio-diesel by extracting oil from the algae habitat Brown algae are eaten by herbivorous organisms such as fish, gastropods and sea urchins. (rhas.ca)
  • Algae, a diverse group of aquatic organisms, play a crucial role in our ecosystems and have a significant impact on various industries such as energy, food, pharmaceuticals, and the environment. (maritimepage.com)
  • Algae are diverse aquatic organisms, that play a vital role in ecosystems and various industries. (maritimepage.com)
  • Green algae are a diverse group of photosynthetic organisms that can be found in various aquatic environments, such as freshwater, marine, and even some terrestrial habitats. (maritimepage.com)
  • Red algae , also known as Rhodophyta, are predominantly marine organisms found in both shallow and deep waters. (maritimepage.com)
  • Algae are fascinating and diverse organisms, displaying a wide range of microscopic structures. (maritimepage.com)
  • 5. In which group of organisms the cell walls form two thin overlapping shells which fit together? (recruitmenttopper.com)
  • Algae and plants that become attached to other organisms without parasitizing them are termed a. epiphytes. (easynotecards.com)
  • Prokaryotic cells have been on Earth billions of years longer than eukaryotic cells or eukaryotic organisms. (scientistcindy.com)
  • All prokaryotic organisms are composed of only one prokaryotic cell. (scientistcindy.com)
  • Eukaryotic organisms can be either unicellular or multicellular and are composed of eukaryotic cells. (scientistcindy.com)
  • Many prokaryotic organisms that live in aqueous environments also have the added protection of the cell wall. (scientistcindy.com)
  • The Rhodophyta (red algae) are a distinct eukaryotic lineage characterized by the accessory photosynthetic pigments phycoerythrin, phycocyanin and allophycocyanins arranged in phycobilisomes, and the absence of flagella and centrioles (Woelkerling 1990). (agcommercialloan.com)
  • However, when compared to other Cyanobacteria, Vampirovibrio is non-photosynthetic and seems to belong to Melainabacteria, from Greek root words meaning "nymph of dark waters. (wikipedia.org)
  • Chloroplasts probably evolved following an endosymbiotic event between an ancestral, photosynthetic cyanobacterium and an early eukaryotic phagotroph . (wikipedia.org)
  • [16] This event (termed primary endosymbiosis ) is at the origin of the red and green algae (including the land plants or Embryophytes which emerged within them)) and the glaucophytes , which together make up the oldest evolutionary lineages of photosynthetic eukaryotes, the Archaeplastida . (wikipedia.org)
  • [17] A secondary endosymbiosis event involving an ancestral red alga and a heterotrophic eukaryote resulted in the evolution and diversification of several other photosynthetic lineages such as Cryptophyta , Haptophyta , Stramenopiles (or Heterokontophyta) , and Alveolata . (wikipedia.org)
  • We conclude that light and ABA signal competitively in order for algae to position themselves in the water column to minimise photo-oxidative stress and optimise photosynthetic efficiency. (nature.com)
  • Photosynthetic green algae evolved 1 to 1.5 billion years ago when a eukaryotic heterotroph encapsulated a cyanobacterium which ultimately formed a plastid 1 . (nature.com)
  • Thus, properly defining a role for ABA in a photosynthetic progenitor of land plants where water stress is not normally an issue, the green algae may give valuable insight into its other roles. (nature.com)
  • Reasoning that high-light-induced photo-oxidation likely poses the main threat to photosynthetic algae, here the initial investigation focused on the effect of ABA on the photosynthetic efficiency of C. reinhardtii by measuring the ability of treated algae to deplete their growing media of dissolved HCO 3 − under different light levels. (nature.com)
  • Blue-green algae, also known as Cyanobacteria, are a unique group of photosynthetic bacteria found in a wide range of environments, including fresh and saltwater bodies, soil, and even in extreme conditions like hot springs. (maritimepage.com)
  • Green algae range in size from microscopic to large plants, and can be single celled, colonial, or filamentous. (rhas.ca)
  • In Microbiology, Spirulina refers to the microscopic algae that have been converting sunlight into energy for billions of years. (studysmarter.co.uk)
  • 3] The majority of species (6,793) are found in the Florideophyceae (class), and mostly consist of multicellular, marine algae, including many notable seaweeds. (agcommercialloan.com)
  • [17] In addition to multicellular brown algae, it is estimated that more than half of all known species of microbial eukaryotes harbor red-alga-derived plastids. (wikipedia.org)
  • They can be unicellular or multicellular, and their cells contain various organelles similar to those found in higher plants. (maritimepage.com)
  • Therefore, the aim of this study was to define a specific role for ABA in the motile green alga, Chlamydomonas reinhardtii , providing evidence that this phytohormone mediates the light-dependent diurnal rhythm of up and down gravitaxis of the algae in the water column. (nature.com)
  • Some well-known examples of green algae include Chlamydomonas, Spirogyra, and Ulva 1 . (maritimepage.com)
  • Chlamydomonas cells c. (easynotecards.com)
  • water molds, golden algae, and brown algae. (rhas.ca)
  • The red algae form a distinct group characterized by having eukaryotic cells without flagella and centrioles , chloroplasts that lack external endoplasmic reticulum and contain unstacked (stroma) thylakoids , and use phycobiliproteins as accessory pigments , which give them their red color. (wikipedia.org)
  • Compartmentalization only exists in eukaryotic cells Eukaryotic cells are compartmentalized. (scientistcindy.com)
  • Eukaryotic cells also contain many membrane-bound organelles. (scientistcindy.com)
  • Eukaryotic cells have a nucleus and membrane-bound organelles. (scientistcindy.com)
  • Prokaryotic cells are smaller than eukaryotic cells. (scientistcindy.com)
  • Prokaryotic cells are structurally less complex than eukaryotic cells. (scientistcindy.com)
  • represents everything inside eukaryotic cells that are internal to the cell membrane (or plasma membrane) but external to the nucleus. (scientistcindy.com)
  • Plant cells, which are eukaryotic cells, have cell walls. (scientistcindy.com)
  • The aquatic to terrestrial transition must have posed a significant challenge to algae and environmental differences required the adaptive evolution of protective mechanisms enabling them to become high-light and desiccation tolerant and sessile at the water surface. (nature.com)
  • Red algae are important contributors to the marine ecosystem, as they are primary producers and serve as a habitat for various aquatic species. (maritimepage.com)
  • 1. Habitat : Algae are predominantly aquatic through alsofound in other habitats. (rbsesolutions.com)
  • Algae populations are often commonly observed in aquatic or moist environments. (easynotecards.com)
  • Some examples of species and genera of red algae are: Red algal morphology is diverse ranging from unicellular forms to complex parenchymatous and non- parenchymatous thallus. (agcommercialloan.com)
  • They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. (lookformedical.com)
  • a. euglenoids c. brown algae b. green algae d. red algae Rhodophyceae (Red Algae) There are about 5000 known species of Red Algae most of them are lived in marine except a few freshwater forms (Batrachospermum). (agcommercialloan.com)
  • It is a large group of algae consisting of about 831 genera and over 5;250 species. (agcommercialloan.com)
  • [6] Approximately 5% of red algae species occur in freshwater environments, with greater concentrations found in warmer areas. (wikipedia.org)
  • Red algae such as Palmaria palmata (dulse) and Porphyra species ( laver / nori / gim ) are a traditional part of European and Asian cuisines and are used to make other products such as agar , carrageenans and other food additives . (wikipedia.org)
  • Species of cyanobacteria can grow on the walls and roofs of building during rainybseason causing discoloration, corrosion and leakage. (rhas.ca)
  • More than 100 species of algae are used as food by humans. (rhas.ca)
  • This group of algae is known for some of the largest and most complex species, such as kelp, which can form dense underwater forests3. (maritimepage.com)
  • All algae get their energy from the sun from photosynthesis, but one thing that distinguishes red algae from other algae is that their cells lack flagella, the long, whiplike outgrowths from cells that are used for locomotion and sometimes serve a sensory function. (agcommercialloan.com)
  • Their ability to produce oxygen through photosynthesis makes algae a critical component of the Earth's life support system. (maritimepage.com)
  • Algal cells typically contain chloroplasts for photosynthesis, which allows them to produce energy from sunlight. (maritimepage.com)
  • The most significant difference was that members of Bdellovibrio are intracellular parasites, both residing and dividing in the periplasmic space in its host, whereas Vampirovibrio is epibiotic, attaching to the cell wall of green algae in the genus Chlorella. (wikipedia.org)
  • The bacterium attaches to the surface of green algae of the genus Chlorella. (wikipedia.org)
  • V. chlorellavorus will not grow in axenic cultures, depending on access to living cells of its preferred algae host, Chlorella vulgaris for reproduction. (wikipedia.org)
  • Gromov and Mamkaeva first isolated Bdellovibrio chlorellavorus in a lysis experiment with the algae Chlorella vulgaris from Ukrainian reservoir waters from a mass culture of Chlorella[which? (wikipedia.org)
  • In a later experiment, the scientists were then able to cultivate B. chlorellavorus together with Chlorella vulgaris at 24 °C (75 °F) and pH 6.8 in a liquid agar solution under fluorescent lighting (at an average of 2100 lux). (wikipedia.org)
  • Dr. Hugenholtz and colleagues from the University of Queensland in Australia, have completed shotgun sequencing of lyophilized cells of V. chlorellavourus strain in culture with Chlorella vulgaris. (wikipedia.org)
  • For example, they may be sprinkled … Occurrences of algal blooms have been responsible for the closure of popular swimming … Some of the single celled and colonial green algae have small tails or "flagella" attached to each cell, which they use to swim. (rhas.ca)
  • 1. Water Blooms or Alga Bloom: Presence of large amounts of nutrients in waters also causes excessive growth of planktonic (free-floating) algae such as Microcystis, Oscillatoria, called an algal bloom imparts a distinct colour to the ater bodies. (rbsesolutions.com)
  • As you are studying various algal groups, you encounter one that has silicon dioxide as part of the cell wall. (easynotecards.com)
  • 3][4] Red algae are abundant in marine habitats but are relatively rare in freshwaters. (agcommercialloan.com)
  • Unlike cells of animals and other eukaryotes , bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles . (alchetron.com)
  • It is therefore the only current diagnostic tool that allows the establishment of a link between the potential causative agent and the specific changes in cell and tissue ( Work & Meteyer, 2014 ). (peerj.com)
  • The authors isolated a causative cyanobacterium ( Pseudanabaena yagii ) from the water supply source, analyzed its whole genome, and investigated the mechanism that induces a high concentration of 2-MIB odor at low water temperature. (mdpi.com)
  • Although not technically algae, they are often classified and discussed in the context of algae due to their similar characteristics and functions 4 . (maritimepage.com)
  • Write four characteristics of algae. (rbsesolutions.com)
  • The economic activities with considerable economic impacts due to algae blooms includes: Increasing of the water treatment costs: This includes the direct cost of supplements or equipment to tackle an algae Bloom, and also the retribution measures that may apply to an affected population, in case the effects could not be avoided. (rhas.ca)
  • Cyanobacteria have heterocysts. (rhas.ca)
  • In contrast, prokaryotic cells do not have a nucleus, nor do they have membrane-bound organelles. (scientistcindy.com)
  • Prokaryotic cells do not have a nucleus. (scientistcindy.com)
  • Prokaryotic cells do not have membrane-bound organelles. (scientistcindy.com)
  • In prokaryotic cells, the cytoplasm would refer to all of the intracellular contents. (scientistcindy.com)
  • It has been considered that AgNP mode of action depends on monovalent ionic silver (Ag + ), which is released inside the microbial cells and inhibits microbial growth through suppression of respiratory enzymes and electron transport components (Li et al. (springeropen.com)
  • BACTERIAThe Prokaryotes:Eubacteria and Achaea SBI3U Biology Dr. Oz (4:37 min): http://www.youtube.com/watch?v=CljhLb1Ar9U Toilet germs (1:53 min): http://www.youtube.com/watch?v=v6nGgS6ADoI&feature=related Cell Phones! (slideserve.com)
  • We suggest that the development of this response mechanism in motile algae may have been an important step in the evolution of terrestrial plants and that its retention therein strongly implicates ABA in the regulation of their relevant tropisms. (nature.com)
  • It was later decided that phylum Cyanobacteria, class Melainabacteria, order Vampirovibrionales, and family Vampirovibrionaceae more accurately classified the organism, although Melainabacteria is now described as a phylum in its own right, distinct from Cyanobacteria. (wikipedia.org)
  • Red algae are an important part of the world's ecosystem because they are eaten by fish, crustaceans, worms, and gastropods, but these algae are also eaten by humans. (agcommercialloan.com)
  • In addition, algae contain other cell structures such as the nucleus, mitochondria, and a protective cell wall. (maritimepage.com)
  • The cytoplasm includes the intracellular fluid, dissolved substances and organelles of the cell, but does not include the nucleus or the contents of the nucleus. (scientistcindy.com)
  • As such mechanisms became more effective, the depth to which algae needed to descend presumably reduced, enabling them to thrive closer into the shoreline. (nature.com)
  • 2005, the red algae are classified in the Archaeplastida, along with the glaucophytes and green algae plus land plants (Viridiplantae or Chloroplastida). (agcommercialloan.com)
  • Not all of these algae are a reddish color, though, as those with less phycoerythrin may appear more green or blue than red due to the abundance of the other pigments. (agcommercialloan.com)
  • [10] But despite their name, red algae can vary greatly in color from bright green, soft pink, resembling brown algae, to shades of red and purple, and may be almost black at greater depths. (wikipedia.org)
  • Classification of the green algae: a concept based on comparative cytology. (rhas.ca)
  • Based on their mode of nutrition, lichens are in a symbiotic relationship between green algae and fungus. (rhas.ca)
  • Molecular evidence, … Economic Importance of Green Algae. (rhas.ca)
  • Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. (rhas.ca)
  • 29-72 in DEG Irvine and DM John, "Systematics of the Green Algae", Systematics Association Special Volume #27, Academic Press, … CiteScore values are based on citation counts in a range of four years (e.g. (rhas.ca)
  • 3. Others: The green alga Cephaleuros virescens cuases red rust on the leaves of tea and C. coftèae causes red ust on the leaves of coffee. (rbsesolutions.com)
  • 14. Archaebacteria differ from eubacteria in (AIPMT 2014) (a) cell membrane structure (b) mode of nutrition (c) cell shape (d) mode of reproduction. (recruitmenttopper.com)
  • V. chlorellavorus leaves behind only the cell wall and cytoplasmic membrane of Chromatium along with a few intracytoplasmic inclusions. (wikipedia.org)
  • on the exterior of the wall, delineated by a double membrane, appear to originate from the outer membrane. (microbiologyresearch.org)
  • Therefore, they play significant roles in maintaining cell structure and the membrane fluidity, which are involved in development, energy metabolism and stress response (Pereira et al. (springeropen.com)
  • The cell membrane protects the cell by creating a barrier between what is inside the cell and what is outside the cell. (scientistcindy.com)
  • The cell membrane also regulates what comes into and what goes out of the cell. (scientistcindy.com)
  • For this reason, we consider the cell membrane to be "SELECTIVELY PERMEABLE" which means that it allows some substances to enter or exit the cell, but not others. (scientistcindy.com)
  • The Cell Membrane is selectively permeable due to its structure. (scientistcindy.com)
  • The phospholipid bilayer of the cell membrane has a unique structure. (scientistcindy.com)
  • When the phospholipids form the cell membrane, the polar, hydrophillic (water-loving) heads are oriented towards the liquid outside the cells ( extracellular fluid) and the liquid inside the cell ( extracellular fluid ). (scientistcindy.com)
  • The cell wall lies on the outside of the cell membrane and gives additional protection to the cell. (scientistcindy.com)
  • They are found in fresh water,salty and marine water, in ice and in moist conditions.Sorne algae are found in unusual places also. (rbsesolutions.com)
  • No significant differences were detected between its wall composition and that of the parent strain but it was particularly sensitive to carbenicillin. (microbiologyresearch.org)
  • Disruption of samples of the same bacterial suspension by ultrasonic treatment or with the French pressure cell frequently resulted in quantitative, and sometimes qualitative, differences in the yield of ribosomes. (microbiologyresearch.org)
  • V. chlorellavorus is an extracellular parasite and remains attached to the cell wall. (wikipedia.org)
  • Plant cells are surrounded by an extracellular matrix that consists mainly of polysaccharides. (mdpi.com)
  • Organic extracellular matrix production as a means of cell-cell and cell-substrate adhesion has been extensively studied. (nature.com)
  • We demonstrate that a mature 3D structure of mineral scaffolds holds the extracellular matrix and the bacterial cells together. (nature.com)
  • There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water . (alchetron.com)
  • They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive. (lookformedical.com)
  • Cell Walls cont'd Chemical nature of a cell wall can be determined by Gram Staining. (slideserve.com)