Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 18.4, Problem 2TQ
Summary Introduction
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The mechanism for migration of the daughter nucleoid of Hyphomicrobium through the stalk to the daughter cell.
Introduction:
Proteobacteria possess a cell envelope that has an outer membrane along with a peptidoglycan cell wall. Receptor proteins, lipopolysaccharide, and porins are packed in the outer membrane. These form a major phyla of the Gram-negative bacteria. They display diverse form and
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Microbiology: An Evolving Science (Fourth Edition)
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- When the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. How is the life cycle of Ascomycetes different from that of humans? A. Haploid cells undergo meiosis. B. Haploid cells undergo mitosis. C. Diploid cells undergo meiosis. D. Diploid cells undergo mitosis.arrow_forwardWhich statement about life cycles with a dikaryon stage is false? A zygosporangium results from the fusion of two coenocytic hyphae. In effect, the dikaryon is neither diploid nor haploid. Dikaryotic hyphae often have characteristics that are different from those of their n or 2n products. The only true diploid structure is the zygote. There are no gamete cells, only gamete nuclei.arrow_forwardYeast are unicellular fungi that reproduce by budding (Fig. 8.4.). Identify individual yeast cells and locate a budding cellarrow_forward
- What is the function of the plasmalemma and pellicle in euglenid cells? How are these structures similar to the bacterial cell wall?arrow_forwardDescribe budding in yeast, a fungus.arrow_forwardIs protist dna in a nucleus unicellular or multicellular?According to the phylogeny presented in this chapter which protists are in the same eukaryotic supergroup as plants a) green algae b) dinoflagellates c) red algaed both a and c in a lifecycle with alternation of generations multicellular haploid forms alternate with a unicellular haploid forms b unicellular diploid formsc multicellular haploid forms d) multicellular diploid formsarrow_forward
- In embryophytes, especially spermatophya, what is the difference between a "sporocyte" (e.g., megasporocyte) and the actual spore (e.g., megaspore)? a) Meiosis: Megasporocyte is still diploid, megaspore haploid b) Mitosis, number of nuclei: Megaspore has eight cell nuclei, megasporocyte only one c) Cytokinesis: Megasporocyte has only one cell, Megaspore can have several (as endosporic gametophyte). d) None: the two terms are synonymous. e) Meiosis: Megaspore is still diploid, megasporocyte haploidarrow_forwardZygomycete bread molds such as Rhizopus stolonifer (black bread mold) produce sporangia in both sexual and asexual reproductive cycles. Which of the following do the sexual sporangia of Rhizopus stolonifer originate from (i.e. what does the sporangia grow out of)? Select one: O a. from the aseptate hyphae O b. from the zygosporangium O c. from the substrate O d. from the gametangiaarrow_forwardIdentify: 1. A part of the chloroplast in the green algae important in carbon dioxide fixation and for production and concentration of starch. 2. Subgroup of Kingdom Viridiplantae with cytokinesis marked by phragmoplast formation. 3. Subgroup of Kingdom Viridiplantae with centrioles and closed mitosis. 4. Chloroplast morphology of the Chlamydomonas. 5. The characteristic life cycle of Chlamydomonas. 6. Sexual reproduction in Chlamydomonas characterized by the fusion of morphologically similar gametes. 7. Sexual reproduction in Volvox characterized by the fusion of a large, immotile female gametes with small, motile male gametes. 8. The common name of the genus Chara. 9. The specific structure that produce the male gametes in Chara. 10. The specific structure that produce the female gametes in Chara.arrow_forward
- In fungi, asexual spores are produced by_________ celldivision and have__________ set(s) of chromosomes.Sexual spores are produced by________ cell divisionin a(n)_______ and have_________ set(s) ofchromosomes.arrow_forwardEach ascus within an ascomycete fruiting body contains eight cells. Are these cells haploid, diploid, or dikaryotic? Is every cell within an ascus genetically unique? What is the fate of each cell?arrow_forwardWhen the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. Based on the diagram, how many unique ascospores are produced in each ascus resulting from the cross fertilization of two Ascomycetes fungi? A. 1 B. 2 C. 4 D. 8arrow_forward
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