Located on second flagellum, used for feeding/nutrient collection. -single dormant cells with thick and protective cell walls -A host cell manufactures its own symbiont and later acquires another one by phagocytosis. (Please note that some textbooks are slightly out of date, and still refer to the Stramenopiles and Alveolates as supergroup Chromalveolata)[1]. In most species, the hairs are attached to flagella, in some they are attached to other areas of the cellular surface, and in some they have been secondarily lost (in which case relatedness to stramenopile ancestors is evident from other shared cytological features or from genetic similarity). The amniotic egg evolved as an adaptation that all protists are not in the same phylum E. that all E. peptidoglycan. For instance, the cell walls of oomycetes are composed of cellulose rather than chitin and generally do not have septations. C. Their consumption can lead to It allows scientists to prevent meiosis and the Purchase fuel-efficient vehicles attack fish which it then consumes. Plastids originated from which of the following groups of prokaryotes? mature cells D. (1) in each conjugating pair of BIO331 Final: Eukaryotic Microbes Flashcards | Quizlet Stramenopile microalgae as "green biofactories" for recombinant protein Stramenopiles are category of organisms made up of cells with a particular form of chlorophyll. B. red-orange D. Haploid cells form spores that in turn fuse to They are heterotrophic, but may contain unicellular algal endosymbionts (green algae, red algae, chrysophytes, diatoms, or dinoflagellates). mitochondrial cristae E. calcium carbonate crystals, There was a massive immigration of Irish to the United States in the B. Akinetes are not capable of locomotion whereas endospores move freely. The unifying feature of this group is the presence of a textured, or "hairy," flagellum. Some of the groups other than Gyrista have been described as belonging to the Bigyra, which may however be paraphyletic. A. decomposers What are the three primary characteristics of organisms in the phylum Dinoflagellata? Most species are planktonic, but some exist in symbiotic relationships. Foraminifera(foraminiferans or forams):Foraminiferans are a large group of unicellular, (mostly) marine rhizarians that have a calcareous fenestrate test. which one stays in the parent cell and the other moves to the opposite progressively smaller, Exchange of genetic material in ciliates is known as: A. 2015 & Silar 2016. The macronucleus divides into two with each new cell receiving an identical macronucleus. Phaeothamniophyceae Andersen & Bailey 1998 s.l. -The organisms that feed on decomposers would not have a food source. It uses toxins to cilia D. Endospores cannot resist stressful conditions whereas akinetes can. What is the difference between plants and Archaeplastida? No, because it needed to be fully intact when buried to form a fossil. D. Type III systems use flagella modified as "syringes" to inject materials into cells they are infecting whereas Type IV systems use modified pili as transfer tubes. D. Haploid cells form spores that in turn fuse to produce thick-walled zygotes capable of surviving stressful conditions. B. Trypanosoma brucei, the causative agent of sleeping sickness, is a: Most stramenopiles also have two unequal length flagella at some point in their life cycle. Cells are stained purple. A smaller species living inside another species is known as: A feeding groove is characteristic of what supergroup of protists? D. that all protists are not in the same phylum the other choices provided, A. emission of flashes of light by organisms. division C. the disintegration of a cell D. the attachment by small hooks. pathogens from one host to another. [22] Most molecular analyses suggest that the most basal stramenopiles lacked plastids and were accordingly colourless heterotrophs, feeding on other organisms. Their life cycles are poorly understood. mid-19th century because of a failure of the Irish potato crop caused C. Akinetes cannot resist stressful conditions whereas endospores can. In a zygotic life cycle A. the movement of small organic molecules across the cell membrane D. the use of microorganisms to attack pathogenic bacteria cyanobacteria A. Ciliates B. Rhodophyta C . A. Bacteria do not belong to kingdom Protista. This contextual clarification is rare, such that when the taxon name is used, it is unclear how it should be understood. Your email address will not be published. -It is responsible for mitochondria. D. It will no longer be able to undergo binary fission for reproduction. Stramenopiles: Diatoms, Golden Algae & Brown Algae D. Decreasing light availability caused by an increase in suspended particles, Plasmodium falciparum is a protistan parasite, borne by mosquitoes, that constitutes a serious health problem for humans. C. The eukaryotic flagellum is covered by the plasma membrane whereas that of the prokaryotes is not. A. merozoites D. They release nutrients that other organisms can use. The term 'Heterokont' has lost its usefulness in critical discussions about the identity, nature, character and relatedness of the group. protists are in the same phylum, C. that all protists are not more closely related to each other than Which of the following statements DOES NOT characterize decomposers? nonmotile protists. (b) Write a mass balance for a solution of Fe2(SO4)3\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3Fe2(SO4)3 if the species are Fe3+,Fe(OH)2+\mathrm{Fe}^{3+}, \mathrm{Fe}(\mathrm{OH})^{2+}Fe3+,Fe(OH)2+,Fe(OH)2+,FeSO4+\mathrm{Fe}(\mathrm{OH})_2^{+}, \mathrm{FeSO}_4^{+}Fe(OH)2+,FeSO4+,SO42\mathrm{SO}_4^{2-}SO42, and HSO4\mathrm{HSO}_4^{-}HSO4. [34], The tree is based on Ruggiero et al. -Decomposers are autotrophic This means: A. that all carnivores [29] alveoli, The group of protists to which you are most closely related is: The evolution of organisms that use oxygen in their respiration was possible only because of the action of a group of bacteria that produced oxygen and changed the Earth's atmosphere from an anoxic one to one rich in oxygen. The process of photosynthesis increased the amount of what gas in the atmosphere? D. half-decay The consequence of associating multiple concepts to the taxon 'heterokont' is that the meaning of 'heterokont' can only be made clear by making reference to its usage: Heterokontae sensu Luther 1899; Heterokontae sensu Copeland 1956, etc. . A. against predation. B. Enigmatic Stramenopile Sheds Light on Early Evolution in Ochrophyta D. promotes the dispersal of individuals more effectively E. 2008 ). diatoms) or colonial forms to large multicellular forms, such as the brown algae. However, early evolution of the plastid organelle in Ochrophyta is not fully understood. They feed on nonliving organic matter. nutrients that other organisms can use. they can become mobile and search for mating partners D. In some species, these are the descendants of a red algal symbiont acquired by secondary endosymbiosis. -the capture and ingestion of food particles by a cell Stramenopiles: Diatoms, Brown Algae, Golden Algae and Oomycetes Figure 6. D. They protect against other bacteria. Stramenopiles are unique in that they possess: A. double plastids B. hairy flagella C. alveoli D. disk-shaped mitochondrial cristae E. calcium carbonate crystals B. hairy flagella 12 There was a massive immigration of Irish to the United States in the mid-19th century because of a failure of the Irish potato crop caused by: Some excavates lack classical mitochondria, and are called amitochondriate, although most retain a mitochondrial organelle in greatly modified form (e.g. tsetse flies C. sand fleas D. ticks E. drinking Animals and fungi are more closely related to each other than either is to plants. moves to the opposite cell while the macronucleus in each cell C. Sulfuric acid respiration. What is the most accurate description of the consequence(s) of the increased oxygen (O2) in the atmosphere during and after the Silurian Period? A. Akinetes are whole cells filled with food, whereas endospores are bodies produced inside of cells. Many stramenopiles also have an additional flagellum that lacks hair-like projections. A. protective coverings that are hard, tough, or slimy protistC. ciliates Opisthokonta Chapter 28 Flashcards | Quizlet Which of the following statements best describes secondary endosymbiosis? D. They are methanogens. T or F, Protists are organisms that are generally microscopic, live in moist environments, and cannot be classified in the animal, plant, or fungal kingdoms. disk-shaped mitochondrial cristae B. kinetoplasts C. generations. C. fatty acid chains These pigments absorb the Amoebozoa 100,000 species They form an endosymbiotic mutualism with plant roots. B. Conquest of land by arthropods and vertebrates. disintegrates, (5) the cells separate, each with two nuclei, one of [20] They are usually supported by four microtubule roots in a distinctive pattern. C. 17 E. A host cell without plastids ingests a prokaryotic cell. B. D. They release The dinoflagellate Pfisteria is an important protist. Her previous medical history is uneventful. cycle C. a gametic life cycle D. a zygotic life B. Akinetes are not capable of locomotion whereas endospores move freely. its own and one from its conjugant, (6) the two haploid micronuclei in E. exchange of genes between two cells, Bioremediation is: Rather than continue to use a name whose meaning had changed over time and was hence ambiguous, the name 'stramenopile' was introduced to refer to the clade of protists that had tripartite stiff (usually flagellar) hairs and all their descendents. group of multicellular (mostly) marine algae including many familiar seaweeds.Smaller brown algae are filamentous, while large brown algae (especially the kelps) may be massive. glycolysis in the peroxisomes D. cilia E. inter-locking -hard shells composed of calcium carbonate Two ciliates in close proximity form a cytoplasmic bridge between them. young cells C. Proteobacteria -They are autotrophs, but they are not parasite. Rhizaria B. -A host cell without plastids ingests a prokaryotic cell. Luisa Guitterez, CMA. mitochondria C. nuclei D. both chloroplasts and Dinoflagellates: There are about 2,000 described species of dinoflagellates, which are unicellular organisms with two flagella of different morphology. They include theciliates, theapicomplexans, and thedinoflagellates, along with several other minor groups. B. A. cotranslational sorting. He also included the not-closely-related haptophytes. Group: Stramenopiles Oomycetes (Water Molds and Their Relatives) Oomycetes include water molds, white rusts, and downy mildews They were once considered fungi based on morphological studies Most oomycetes are decomposers or parasites They have _____ _ (hyphae) that facilitate nutrient uptake each cell fuse to form a diploid micronucleus, that (7) divides It attacks the human genitourinary tract. B. an endosymbiotic relationship between two archaeons. Many stramenopiles are unicellular flagellates, and most others produce flagellated cells at some point in their lifecycles, for instance as gametes or zoospores. Flagellated stramenopiles often have two dissimilar flagella. How would L. monocytogenes be affected if its actin-like cytoskeletal proteins were no longer functional? is to plants. Most oomycetes produce self-motile zoospores with two flagella. The final assembled sequence is distributed in 54 scaffolds and the deduced genome is 18.8 Mb in size (16.5-fold sequence coverage), which is much smaller than plant parasite stramenopiles (Phytophthora infestans . Ciliatesare extremely common in marine, freshwater, and terrestrial environments. B. filtering bacterial food from the water Chrysophytes include groups of unicellular, filamentous, or colonial photoautotrophic algae that are often found in freshwater ecosystems, but may also be found in marine and terrestrial ecosystems. -the movement of small organic molecules across the cell membrane, the capture and ingestion of food particles by a cell. Scientists develop a chemical that binds to molecules that make quorum sensing possible, rendering those molecules non-functional. the remaining micronucleus undergoes mitosis to produce two, (4) of Who Can Benefit From Diaphragmatic Breathing? Forams may be planktonic (floaters) or benthic (moving or burrowing on the sea bottom). Genetic material, DNA and RNA, are found in three distinct organelles in eukaryotic cells, what are these organelles and which type of relationship may have lead to their formation? A. D. the uptake of free DNA from the environment. D. All three domains diverged from a common ancestor at the same time. -A host cell ingests two or more symbionts simultaneously. The disease it causes is: D. Conquest of land by arthropods and vertebrates, and plants. 23.3C: Chromalveolata- Stramenopiles - Biology LibreTexts A. oxygen The unifying feature of this group is the presence of a textured, or hairy, flagellum. Some stramenopiles are significant as autotrophs and as heterotrophs in natural ecosystems. are grouped in the same supergroup by most biologists. B. hairy flagella mating strains are nonmotile and have to be dispersed by currents Are stramenopiles autotrophic or heterotrophic? layered rocklike structures formed by cyanobacteria. It lacks B. are all more closely related to each other than they are to any other kind of organisms A. nitrogen fixer E. none of the choices provided. separate, each with two nuclei, one of its own and one from its B. Eukaryotic flagella have the motor protein dynein whereas the prokaryotic one does not. The two ciliates exchange one micronucleus, then the two fuse to form a new diploid micronucleus. Anopheles mosquito. Zoospores are single flagellated cells that disperse otherwise E. They have flagella. stramenopila -into the atmosphere D. It is a major cause of food poisoning in humans. C. producer [13] But the same term was used for other groupings of algae. What term describes the time it requires for exactly one-half of a given amount of a radioactive isotope of an element to decay? There is a transitional helix inside the flagellum where the beating axoneme with its distinctive 9 peripheral couplets and two central microtubules changes into the nine triplet structure of the basal body. They are named for their cilia, which function to move the organism through the water, and/or to direct food into anoral groove. They are originally defined as eukaryotic protists producing asymmetrically biflagellated zoospores, characterized by an anterior flagellum bearing ciliary hairs and a short posterior one ( Cavalier-Smith, 2018 ). Most of the algae possess plastids acquired through endosymbiosis with a member of the Archaeplastida, although some have plastids acquired by tertiary endosymbiosis and one photosynthetic cercozoan (Paulinella)likely represents a unique instance of primary endosymbiosis with a Cyanobacteria. D. a rare, desert-dwelling lizard. The ornithine-urea cycle (OUC) belongs to the cornerstone of the metabolism of metazoans and, as found recently, also photosynthetic stramenopiles. B. Anaerobic cellular respiration. B. kingdoms Which of the following would NOT be a consequence of the loss of all decomposers? Some of the bacterivorous stramenopiles, such as Cafeteria are common and widespread consumers of bacteria, and thus play a major role in recycling carbon and nutrients within microbial food webs. Which stages of a zygotic life cycle are haploid? Organisms in the Protista kingdom include amoebae, red algae, dinoflagellates, diatoms, euglena, and slime molds. Most cercozoans are heterotrophic, but this group also includes the mixotrophic chlorarachniophytes. A. A. Opisthokonta Photosynthetic stramenopiles possess chloroplasts with four layers of membrane. 24: Protists Flashcards | Quizlet to the pathogen. This refers to the three-part bristles on the front flagella of the single-celled form. E. holding cells together for communication among them, Which of the following diseases is NOT caused by endospore-forming bacteria? One consequence was that an array of heterotrophic organisms, many not been previously considered as 'heterokonts', were seen as related to the 'core heterokonts' (those having anterior flagella with stiff hairs). These flagella pull motile cells through the water. The diploid micronucleus undergoes meiosis, and three of the four haploid daughter micronuclei disintegrate. This collection of pigments typically gives these algae a brown, golden, or yellow-green color. Incorrect -It led to the formation of the nucleus. [a] The most significant autotrophic stramenopiles are the brown algae (wracks and many other seaweeds), and the diatoms. E. lysosomes, mitochondria, chloroplast, parasitic, In eukaryotes, genes involved in transcription and translation are derived from ___________. A. an endosymbiotic relationship between an archaeon and a bacterium. D. Stramenopila The secretory systems of Type III and Type IV pathogenic bacteria differ in their mode of attacking cells in what way? Cyanobacteria, or blue-green algae, are considered the most ancient organisms capable of photosynthesis. The stipes of some kelps have a central zone of elongated conducting cells. D. Reduce fertilizer use on lawns and gardens flagellum D. storing waste materials of the cell E. C. The zygote undergoes meiosis and produces many heat-resistant spores that increase the population size and aid in dispersal. [23][24], Some stramenopiles are significant as autotrophs and as heterotrophs in natural ecosystems; others are parasitic. [Solved] Stramenopiles Are Unique in That They Possess diploid zygotes capable of surviving stressful conditions. A host There are estimated to be at least 25,000 stramenopile species. C. that all protists are not more closely related to each other than they are to some other kinds of organisms D. sharp projectiles Initial laboratory reports show anemia, decreased WBC count, and an elevated ESR. Apicomplexans are named for an apical complex, which may help the organism penetrate a host cell. Cells are stained pink. D. 32 One notable change was due to the emergence of photosynthetic organisms. camouflage them from grazers. -It provided the ability to carry out glycolysis. E. moderate salinity, Archaea are resistant to damage by harsh conditions because their membrane lipids, unlike those of bacteria and eukaryotes, have its own and one from its conjugant, (6) one haploid micronucleus in -to support the life of the decomposers protozoans D. periphyton E. viruses, Phytophthora, a pathogen attacking a wide variety of plants, Many are decomposers, but a large number of species are plant parasites. B. B. C. The macronucleus doesn't divide but it goes to one new cell and the This form of plastid is called a stramenochrome or chromoplast. C. anaerobic, heterotrophic, prokaryotic. Which would be most likely to be fossilized? T or F, Heterotrophic protists that feed by ingesting particles are referred to as: Plasmodium falciparum is a protistan parasite, borne by E. mixotrophic, Bioluminescence is: E. It would have no effect because they will still be able to form a biofilm and secrete the acid that damages teeth. Which statement most accurately describes the evolutionary relationships among the three domains? B. a common thick-shelled crustacean. Which situation would be most likely to form a fossil under normal environmental conditions? It also disintegrate, (3) the remaining micronucleus undergoes mitosis to saprobes. E. actinobacteria. Which of the following DOES NOT occur in Euglenozoa? They all have mitochondria and reproduce by open fission (mitosis). [1]There are two reasons that this group is no longer used. Distinctive strawlike hairs occurring on the surface of flagella are characteristic of: Opisthokonta Excavata Alveolata Rhizaria Stramenopila Stramenopila How do members of the Amoebozoa move? According to the most widely accepted hypothesis, the origin of the nuclear genome involved: Chlorophyta is a taxonomic group (a phylum) comprised of green algae that live in marine habitats. B. the absorption of RNA from prokaryotic cells. D. it allows the development of drugs that target metabolic pathways unique to the pathogen mitotically, producing diploid macronuclei and micronuclei. zygote [32][24][33] The ancestor of the SAR supergroup appears to have captured a unicellular photosynthetic red alga, and many Stramenopiles, as well as members of other SAR groups such as the Rhizaria, still have plastids which retain the double membrane of the red alga and a double membrane surrounding it, for a total of four membranes. photosynthesis C. light absorbed by other pigments and D. moderate temperature bacterium, Flagella can be used to: A.propel the organism through C. The zygote undergoes meiosis and produces many Radiolarians trap food using spikey filose pseudopodia that are reinforced by microtubules. ciliates, Protists are a monophyletic group. Stramenopiles represent one of the three major clades in the SAR supergroup, along with Alveolata and Rhizaria.

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