PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 25, Problem 1AL
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If the spores of a fungus are haploid and divide to form the hyphae by mitosis, then what are the cells of the hyphae (haploid, diploid, tripled) ?
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.
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.
Chapter 25 Solutions
PRESCOTT'S MICROBIOLOGY
Ch. 25.1 - Prob. 1CCCh. 25.1 - What is the distribution of these microbes?Ch. 25.1 - Prob. 3CCCh. 25.1 - Prob. 4CCCh. 25.1 - Prob. 5CCCh. 25.2 - Prob. 1MICh. 25.4 - Prob. 1CCCh. 25.4 - What is the difference between hyphae called...Ch. 25.4 - How do different mating types of Rhizopus...Ch. 25.4 - Prob. 4CC
Ch. 25.4 - Prob. 5CCCh. 25.5 - What determines when a yeast cell can no longer...Ch. 25.5 - In what ways is the life cycle of filamentous...Ch. 25.5 - Why does nutrient deprivation trigger sexual...Ch. 25.5 - Prob. 2CCCh. 25.5 - Where are you most likely find ascomycetes that...Ch. 25.6 - Prob. 1MICh. 25.7 - Prob. 1CCCh. 25.7 - Prob. 2CCCh. 25.7 - Prob. 3CCCh. 25.7 - Why do you think members of Microsporidia are...Ch. 25 - Prob. 1RCCh. 25 - Prob. 2RCCh. 25 - Prob. 3RCCh. 25 - Prob. 4RCCh. 25 - Prob. 5RCCh. 25 - Prob. 1ALCh. 25 - Prob. 2ALCh. 25 - Prob. 3ALCh. 25 - Analysis of sclerotia and conidia formation in the...Ch. 25 - Prob. 5AL
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- Distinguish among fungi that are haploid, dikaryotic, or diploid by completing the following statements, referring to the figure as necessary. n+n sexual n diploid contains paired haploid nuclei dikaryotic 2n A haploid asexual Saved B Fungi reproduce both sexually and asexually. In terrestrial fungi, reproduction occurs in three stages. One stage, depicted in part A of the figure above, is termed point each cell is First, days, months, or years, the Another stage, depicted in part B of the figure above, is termed stage takes its name from the term for a hypha that each cell is C at which 20 hyphae pair up. Sometimes immediately, other times after hyphae make contact and fuse... This at which point Upon fusion, the hyphae are at the stage represented by part C of the figure above, stage, at which point each cell is termed the Reset *arrow_forwardFungi tend to reproduce sexually when nutrients are limited or other conditions are unfavorable, but they reproduce asexually in more ideal conditions. Why is this strategy successful? Please add a reference website, and an example if possiblearrow_forwardSome fungal species can undergo both sexual and asexual life cycles. During very hot seasons fungi prefer; Select one: a. Asexual reproduction by mitosis, to reduce its genetic diversity b. Asexual reproduction by mitosis to reduce the number of spores c. Asexual reproduction by mitosis to produce diploid cells d. Sexual reproduction by meiosis to produce haploid spores that can resist extreme conditions e. Asexual reproduction by mitosis, as this process needs less energyarrow_forward
- Some fungi exhibit dimorphism, i.e. they can exist in both yeast and mold form. Why is this so? What advantage does this provide for these organisms?arrow_forwardFungi can propagate themselves successfully with their millions of asexual spores. That being the case,why is the production of sexual spores necessary?arrow_forwardThe basidium of the club fungi could be correctly described as; A reproductive structure that produces diploid spores A sexual reproductive structure that produces 4 haploid spores An asexual reproductive structure that produces thousands of spores A sexually reproductive structure that produces 8 haploid sporesarrow_forward
- Both bacteria and fungi are major environmental decomposers. Obviously competition exists in any given environment, but fungi usually have an advantage. What characteristics specific to fungi provide this advantage?arrow_forwardYeast are unicellular fungi that reproduce by budding (Fig. 8.4.). Identify individual yeast cells and locate a budding cellarrow_forwardAfter plasmogamy has occurred, many molds (Mucoromycetes) exist in a heterokaryotic stage for up to centuries at a time. What occurs at the immediate end of this stage? The nuclei fuse in a process called karyogamy. The hyphae fuse in a process called karyogamy. Diploid spores are produced in various spore-producing structures. A haploid zygote is formed that becomes multicellular through repeated rounds of mitosis.arrow_forward
- The Ascomycetes are the largest and most diverse group of fungi. They live in diverse habitats and even include unicellular species know as yeast. Below is a picture of yeasts cells using a SEM. What structure of the yeast cells in the picture is very conspicuous (you may want to read about yeast in our text p. 610)? O bud scar O chlorophyll O daughter cells O meiotic spores MacBcarrow_forwardLabel A-H from image as the following: I: Dikaryotic II: Basidiospores III: Plasmogamy IV: Meiosis V: Diploid VI: Haploid VII: Karyogamy VIII: Zygotearrow_forwardWhat is meant by dimorphism in fungi ?arrow_forward
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