C. Their negative effects would be increased because it will cause them to produce mucilage, allowing them to stick to teeth. \rule{5cm}{0.15mm}. [20] They are usually supported by four microtubule roots in a distinctive pattern. Many stramenopiles also have an additional flagellum that lacks hair-like projections. Cercozoa also includesPaulinella chromatophora,a unicellular photoautotroph whose plastid represents a possible instance of primary endosymbiosis. Why or why not? At the same time, a protistological perspective was replacing the 19th century one based on the division of unicellular eukaryotes into animals and plants. A. Eukaryotic flagella have microtubules in a cytoskeleton whereas prokaryotic ones do not. is a(n): A. algaB. They may arise from asexual reproduction. Ochrophyta is an algal group belonging to the Stramenopiles and comprises diverse lineages of algae which contribute significantly to the oceanic ecosystems as primary producers. bacteriophages B. the phases through which cells pass during D. A host cell ingests one symbiont and then later ingests another one. C. It provided evidence that the earliest life forms were autotrophic. E. anaerobic, chemotrophic, eukaryotic. Apicomplexa Dinoflagellates (Division or Phylum Pyrrhophyta) are a group of primarily unicellular organisms united by a suite of unique characteristics, including flagellar insertion, pigmentation, organelles, and features of the nucleus, that distinguishes them from other groups. Protists Flashcards - Easy Notecards The dinoflagellate Pfisteria is an important protist. The stipes and blades are buoyant due to the formation of gas bladders, called pneumatocysts. division C. the disintegration of a cell D. the attachment The chromalveolates can be subdivided into alveolates and stramenopiles. The alternate host for Entamoeba histolytica is the protozoans D. periphyton E. viruses, Phytophthora, a pathogen attacking a wide variety of plants, Many stramenopiles are unicellular flagellates, and most others produce flagellated cells at some point in their lifecycles, for instance as gametes or zoospores. All of the other choices provided are incorrect, A. diversifies genotypes thereby allowing faster evolutionary 3. neither was toxic Select the statement that correctly describes differences among these four types of algae. Plasmodium sporozoites produce merozoites in the human: Haptophyta, The plastids of red algae originated via: Genome sequence of the stramenopile - Genome Biology C. Both systems attach to cells in the same way but they differ merely in the chemicals that they inject into the host cell. Some dinoflagellates are bioluminescent. Which of the following would NOT be a consequence of the loss of all decomposers? when there is not enough light B. a common thick-shelled crustacean. A. an endosymbiotic relationship between an archaeon and a bacterium. Yes, because its skeleton could have been replaced by minerals to form a fossil. A parasite is also a(n): identical macronucleus. D. domains mitotically and one of the daughter nuclei passes to an individual of A. chloroplast, mitochondria, nucleus, endosymbiotic E. lockjaw. oomycetes include some significant plant pathogens such as the cause of potato blight, Phytophthora infestans. photosynthesis C. light absorbed by other pigments and Diatoms are abundant and ecologically important as a major form of phytoplankton. Chapter 28 Flashcards | Quizlet A. thylakoids This species produces gas vesicles in order to maximize its access to oxygen at the lake's surface. D. killing harmful insects A. cell division by meiosis The process by which the major land masses have shifted their positions, changed shapes and separated from each other, is known as. tsetse flies C. sand fleas D. ticks E. drinking Frustules appear either radially or bilaterally symmetrical. A. Akinetes are whole cells filled with food, whereas endospores are bodies produced inside of cells. Dinoflagellates exhibit both sexual and asexual reproduction. Second, when Chromalveolata was originally proposed, it was united based on the hypothesis that the members of the group were descended from a single biflagellate organism that engulfed a red alga via secondary endosymbiosis. The protists are a diverse group of eukaryotes that cannot be classified as animals, plants, or fungi. Would the archeologists be able to find a fossil of the deer?