Multiple Choice Identify the choice that best completes the statement or answers the question. |
| 1. | All fungi are a. | heterotrophic prokaryotes. | c. | autotrophic prokaryotes. | b. | heterotrophic eukaryotes. | d. | autotrophic eukaryotes. |
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| 2. | Fungi do NOT a. | carry out photosynthesis. | c. | digest food outside their bodies. | b. | grow on their food source. | d. | absorb food through their cell walls. |
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| 3. | Fungi resemble plants in that they both always a. | have stems. | c. | act as parasites. | b. | grow from the ground. | d. | have cell walls. |
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| 4. | A mushroom is a fungal a. | fruiting body. | c. | mycorrhiza. | b. | lichen. | d. | yeast. |
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| 5. | The tangled mass that makes up the body of a fungus is the a. | hypha. | c. | mycelium. | b. | rhizoid. | d. | stolon. |
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Figure 21–1 |
| 6. | Fungal hyphae, shown in Figure 21–1, differ in that some lack a. | cell walls. | c. | nuclei. | b. | cross walls. | d. | cytoplasm. |
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| 7. | A circular arrangement of mushrooms sprouting from the same mycelium is known as a(an) a. | hypha. | c. | imperfect fungus. | b. | fairy ring. | d. | sporangiophore. |
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| 8. | Most fungi reproduce a. | asexually only. | c. | both sexually and asexually. | b. | sexually only. | d. | by budding. |
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| 9. | Stinkhorns, which mimic the odor of rotting meat, have spores that are dispersed by a. | wind. | c. | snow. | b. | birds. | d. | flies. |
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| 10. | When hyphae of opposite mating types meet, they first a. | enter mitosis | c. | enter meiosis. | b. | grow and develop. | d. | fuse. |
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| 11. | Sporangia are found at the tops of specialized hyphae called a. | sporangiophores. | c. | gametangia. | b. | mycelia. | d. | stolons. |
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| 12. | Which of the following processes is first to occur after the nuclei of opposite mating types fuse? a. | Spores are produced. | c. | Mitosis occurs. | b. | Gametes are produced. | d. | Meiosis occurs. |
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| 13. | Dark fuzz that grows on bread is an example of a. | toadstool. | c. | yeast. | b. | spore. | d. | mold. |
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| 14. | Rhizoids in molds are analagous to which structures on plants? a. | flowers | c. | stems | b. | roots | d. | leaves |
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| 15. | In bread mold, haploid gametes are produced by the a. | gametangia. | c. | zygospores. | b. | rhizoids. | d. | sporangiophores. |
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| 16. | Which of the following ingredients is NOT added to bread dough in order to make it rise? a. | sugar | c. | water | b. | yeast | d. | oxygen |
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| 17. | The dry, powdered yeast used to bake bread actually contains a. | zygospores. | c. | conidia. | b. | ascospores. | d. | sporangia. |
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| 18. | Yeasts obtain energy by alcoholic fermentation in the absence of a. | moisture. | c. | oxygen. | b. | carbon dioxide. | d. | sugar. |
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| 19. | Mushrooms are classified as a. | common molds. | c. | club fungi. | b. | sac fungi. | d. | imperfect fungi. |
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| 20. | Which is responsible for the enlargement of fruiting bodies? a. | water uptake by cells in hyphae | c. | production of haploid spores | b. | rapid cell division | d. | expansion of air spaces between the gills |
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| 21. | The common name for members of the phylum Basidiomycota is derived from the shape of their a. | spores. | c. | basidia. | b. | hyphae. | d. | stalks. |
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| 22. | Over time, nutrients at the center of a large underground mycelium become depleted, causing new mushrooms to sprout only a. | in a cluster at the center. | c. | when the nutrients are replaced. | b. | in a ring at the outer edges. | d. | after budding takes place. |
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| 23. | Each of the following is a basidiomycete EXCEPT a. | shelf fungi. | c. | puffballs. | b. | mushrooms. | d. | cup fungi. |
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| 24. | In basidiomycetes, the primary mycelia of different mating types fuse to form a. | a secondary mycelium. | b. | haploid zygotes. | c. | gills. | d. | haploid nuclei of the same mating type. |
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| 25. | Which statement about Penicillium is correct? a. | It produces mushrooms. | c. | It is the source of an antibiotic. | b. | It causes bread to rise. | d. | It causes athlete’s foot. |
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| 26. | Penicillium is classified in phylum Deuteromycota because Penicillium has a. | fruiting bodies. | c. | no observed sexual phase. | b. | gills. | d. | basidiospores. |
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| 27. | Penicillium may have evolved from an ascomycete that lost its ability to carry out a. | asexual reproduction. | c. | spore formation. | b. | sexual reproduction. | d. | conidia formation. |
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| 28. | An important role of fungi in an ecosystem is a. | photosynthesis. | c. | making alcohol. | b. | breaking down dead organisms. | d. | killing bacteria. |
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| 29. | The oldest fossil fungi on record belong to the phylum a. | Ascomycota. | c. | Basidiomycota. | b. | Deuteromycota. | d. | Zygomycota. |
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| 30. | Fungi that absorb food from decaying organic matter are a. | parasites. | c. | mutualists. | b. | saprobes. | d. | autotrophs. |
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| 31. | Fungi feed on a. | only living organisms. | c. | both living and dead organisms. | b. | only dead organisms. | d. | only other fungi. |
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| 32. | The breakdown of dead organisms is accelerated by the fungal production of a. | alcohols. | c. | digestive enzymes. | b. | acids. | d. | recycled nutrients. |
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| 33. | Which of the following statements about fungi is true? a. | They bind trace elements and hold them. | b. | They return trace elements to the soil. | c. | They do not affect trace elements. | d. | They deplete the soil of trace elements. |
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| 34. | Athlete’s foot is caused by the same fungus that causes a. | wheat rust. | c. | ringworm. | b. | moldy bread. | d. | thrush. |
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| 35. | The growth of yeasts in moist regions of the body is kept in check by competition from a. | antibiotics. | c. | rusts. | b. | bacteria. | d. | mildews. |
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| 36. | Crop damage by fungal diseases is a. | greatest in tropical areas. | c. | greatest in temperate areas. | b. | least in tropical areas. | d. | not affected by climate. |
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| 37. | Which structures of the fungus Cordyceps digest tropical grasshoppers from the inside out? a. | spores | c. | fruiting bodies | b. | hyphae | d. | mycelia |
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| 38. | Each of the following is true of wheat rust EXCEPT that it a. | is caused by a basidiomycete. | b. | is carried by insects into wheat fields. | c. | is controlled by destroying barberry plants. | d. | produces two kinds of spores. |
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| 39. | The normal balance between bacteria and yeasts in the body can be upset by a. | eating yeast-leavened bread. | c. | using antibiotics. | b. | eating edible mushrooms. | d. | being exposed to mushroom spores. |
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Figure 21–2 |
| 40. | Figure 21–2 illustrates an association of a(an) a. | cyanobacterium and a plant. | c. | plant and a fungus. | b. | alga or cyanobacterium and a fungus. | d. | alga and a plant. |
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| 41. | Which of the following is NOT a single organism? a. | mushroom | c. | yeast | b. | smut | d. | lichen |
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| 42. | Which statement about lichens is correct? a. | They are not tolerant of harsh conditions. | b. | They cannot make their own food. | c. | They grow only in soil. | d. | They can serve as an air quality indicator. |
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| 43. | The association of plants and fungi in mycorrhizae illustrates a type of relationship called a. | parasitism. | c. | competition. | b. | mutualism. | d. | parallelism. |
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| 44. | In a mycorrhizal relationship, what benefit does the plant get from the fungus? a. | protection from harsh conditions | c. | products of photosynthesis | b. | aid in seed dispersal | d. | aid in the absorption of water and minerals |
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| 45. | Beneath the forest floor, carbon atoms can be moved from one tree to the next by a. | orchids. | c. | mycorrhizae. | b. | fungal spores. | d. | lichens. |
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| 46. | Which of the following is not a characteristic of fungi? a. | membrane-bounded nuclei | b. | mitochondria | c. | cell wall of lipopolysaccharides | d. | primarily terrestrial in habitat | e. | reproduction via spores |
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| 47. | The cell walls of fungi are composed of: a. | cellulose. | b. | lipids. | c. | glycogen. | d. | chitin. | e. | chlorophyll. |
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| 48. | Fungi can grow under all of the following conditions except: a. | concentrated salt solutions. | b. | an environment with a very low pH of 3. | c. | a dry environment. | d. | jelly or other sugar solutions. | e. | a cold, refrigerated environment. |
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| | Figure 25-01 Use the figure below to answer the corresponding questions.  |
| 49. | In Figure 25-01, the structure labeled 1 is: a. | a conidium. | b. | a perforated septum. | c. | a hypha. | d. | a basidium. | e. | a spore. |
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| 50. | In Figure 25-01, the fungus illustrated in Figure A is: a. | multicellular. | b. | coenocytic. | c. | septate. | d. | dikaryotic. | e. | None of the above. |
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| 51. | An example of a unicellular fungus is: a. | a mold. | b. | a mushroom. | c. | a yeast. | d. | a rust. | e. | a smut. |
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| 52. | A ____________ is a filament that makes up the vegetative body of most fungi. a. | thallus | b. | protonema | c. | fruiting body | d. | hypha | e. | septa |
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| 53. | Which group of fungi have hyphae that are multinucleate and not divided by septa? a. | monokaryotic | b. | unicellular | c. | ascomycete | d. | coenocytic | e. | sporophyllous |
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| 54. | A ____________ is a tangled mat of hyphae. a. | sporocarp | b. | sporangia | c. | zygospore | d. | mycelium | e. | coenocyte |
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| 55. | The club fungi typically reproduce by producing: a. | zygospores. | b. | ascospores. | c. | asci. | d. | basidia. | e. | mycorrhizae. |
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| 56. | Most fungal spores are ____________ reproductive cells that are produced ________________________. a. | motile; sexually only | b. | motile; asexually only | c. | nonmotile; sexually only | d. | nonmotile; asexually only | e. | nonmotile; sexually or asexually |
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| 57. | In a fungus, a complex multicellular reproductive structure is called: a. | a hypha. | b. | a gametangium. | c. | a fruiting body. | d. | an oogonium. | e. | an antheridium. |
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| 58. | What makes up most of the mass of an individual mushroom? a. | underground mycelium | b. | above ground mycelium | c. | underground fruiting body | d. | above ground ascocarp | e. | underground ascocarp |
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| 59. | Dikaryotic cells are denoted as: a. | n + n. | b. | n – n. | c. | n. | d. | 2n. | e. | 2n – n. |
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| 60. | Members of phylum ____________ are the most primitive of the fungi and were previously classified as protists. a. | Chytridiomycota | b. | Zygomycota | c. | Oomycota | d. | Ascomycota | e. | Deuteromycota |
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| 61. | One ancestral characteristic remaining in representatives of the Chytridiomycetes is: a. | gametes formed by mitosis. | b. | alternation of generations. | c. | cell walls. | d. | flagellated cells. | e. | both sexual and asexual reproduction. |
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| 62. | An example of a member of phylum Zygomycota is: a. | the common edible mushroom. | b. | yeast. | c. | the black bread mold. | d. | the truffle. | e. | More than one of the above. |
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| 63. | When bread gets moldy with visible black or blue spots, you are looking at masses of the colored: a. | spores. | b. | hyphae. | c. | mycelia. | d. | ascocarps. | e. | thalli. |
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| 64. | Black bread mold is ___________________, which means that it is self-sterile. a. | heterozygous | b. | heterothallic | c. | hetertrophic | d. | mycotoxic | e. | coenocytic |
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| 65. | Reproduction in the black bread mold occurs between ___________________ hyphae. a. | male and female | b. | + and – | c. | dikaryotic and monokaryotic | d. | heterothallic and homothallic | e. | sterile and self-sterile |
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| 66. | An example of a member of phylum Ascomycota is: a. | the common edible mushroom. | b. | yeast. | c. | the black bread mold. | d. | the truffle. | e. | More than one of the above. |
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| 67. | The sac fungi are characterized by sexual reproductive structures called: a. | asci. | b. | basidia. | c. | gemmae. | d. | conidiophores. | e. | conidia. |
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| 68. | Asexual reproduction in sac fungi involves production of spores called: a. | asci. | b. | basidia. | c. | gemmae. | d. | conidiophores. | e. | conidia. |
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| | Figure 25-02 Use the figure below to answer the corresponding questions.  |
| 69. | In Figure 25-02, the structure labeled 11 is: a. | a zygote. | b. | a female gametangium. | c. | a male gemetangium. | d. | a zoosporangium. | e. | a zoospore. |
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| 70. | The process occurring at point 3 in Figure 25-02 is: a. | asexual reproduction. | b. | fertilization. | c. | meiosis. | d. | mitosis. | e. | zygote germination. |
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| 71. | The structure labeled 9 in Figure 25-02 was produced by: a. | fertilization of two zygotes. | b. | meiosis in the resting sporangium. | c. | meiosis in the zoosporangium. | d. | mitosis in the resting sporangium. | e. | mitosis in the zoosporangium. |
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| 72. | An example of a plant disease caused by a basiodiomycete is: a. | chestnut blight. | b. | Dutch elm disease. | c. | verticillium wilt on potatoes. | d. | stem rust of wheat. | e. | All of the above. |
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| 73. | In a mushroom, the primary mycelium is composed of ______________ cells. a. | monokaryotic | b. | dikaryotic | c. | homothallic | d. | coenocytic | e. | prokaryotic |
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| 74. | Puffballs and bracket fungi are most closely related to: a. | molds. | b. | truffles. | c. | the common edible mushroom. | d. | yeast. | e. | the black bread mold. |
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| 75. | Lichens are most typically formed by the symbiotic association of an alga or cyanobacterium and: a. | an ascomycete. | b. | a deuteromycete. | c. | a basidiomycete. | d. | a zygomycete. | e. | All of the above. |
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| 76. | Lichens reproduce primarily asexually by ____________, which are fragments of the body of the lichen. a. | conidia | b. | soredia | c. | asci | d. | basidia | e. | thalli |
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| 77. | Which of the following organisms typically grows most slowly? a. | bread molds | b. | lichens | c. | yeasts | d. | mushrooms | e. | sac fungi |
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| 78. | Which of the following is not produced utilizing fungi? a. | beer | b. | bread | c. | blue cheese | d. | yogurt | e. | wine |
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| 79. | Claviceps purpurea produces _______________, which infests grain and has been important in many historical events, as ingestion of infested grain milled into flour can cause hallucinations and even death. a. | an ergot | b. | a smut | c. | a rust | d. | a brown rot | e. | a mildew |
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| 80. | Fungi parasitic on plants produce specialized hyphae, called ____________, that penetrate the host. a. | soredia | b. | secondary mycelia | c. | basidia | d. | asci | e. | haustoria |
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| 81. | A basidiomycete that infests wheat is the wheat: a. | rust. | b. | wilt. | c. | strobilus. | d. | scab. | e. | rot. |
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| 82. | Which is not a fungal infection in humans? a. | ringworm | b. | athlete’s foot | c. | yeast infections | d. | histoplasmosis | e. | None of the above, all are fungal infections in humans. |
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| 83. | Examples of plant disease caused by an ascomycete are: a. | chestnut blight. | b. | Dutch elm disease. | c. | stem rust of wheat. | d. | abnormal leaf fall of rubber. | e. | Both A and B. |
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| 84. | ______________________ is a common chytridiomycete, which exhibits alternation of generation. a. | phytophthora | b. | Allomyces | c. | Ascomycetes | d. | chytrids | e. | None of the above. |
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| 85. | Which one of the following is mismatched? a. | Bread mold – zygomycetes | b. | Sac fungi – Ascomycota | c. | Yeast – Ascomycota | d. | Truffles – Ascomycota | e. | Ascomycota – ascospores |
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| 86. | The characteristic brown, blue-green, pink, or other tints of ascomycetes are due to the color of their__________. a. | Mycelia | b. | Hyphae | c. | Conidia | d. | Sporangia | e. | None of the above. |
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| 87. | Yeasts reproduce asexually by: a. | division. | b. | budding. | c. | ascospores. | d. | Binary fission. | e. | Both B and D. |
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| 88. | Which one of the following statements is true? a. | Basidiospores are formed within the basidia. | b. | Ascospores are formed outside the ascus. | c. | Both Basidiospores and ascospores are formed within their respective structures. | d. | Both Basidiospores and ascospores are formed outside their respective structures. | e. | Basidiospores are formed outside, and ascospores are formed within, their respective structures. |
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| 89. | Which one of the following is mismatched? a. | Mushroom – Basidiomycetes | b. | Sac fungi – Ascomycetes | c. | Club fungi – Basidiomycetes | d. | Puff balls – Basidiomycetes | e. | Corn smut disease – Ascomycetes |
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| 90. | Mushrooms that we eat are technically referred to as: a. | Basidiospores. | b. | Basidiocarp. | c. | Mycelium. | d. | Hyphae. | e. | Gills. |
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| 91. | Color pigments produced by __________________ are used to dye woolens and litmus. a. | club fungi | b. | mushroom | c. | algae | d. | lichens | e. | puff balls |
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| 92. | Reduction in ____________________ growth is used as a sensitive indicator of air pollution. a. | fungus | b. | mushroom | c. | algae | d. | lichen | e. | puff balls |
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| 93. | Mycorrhiza is an example of ________________. a. | Commensalism | b. | Parasitism | c. | Mutualism | d. | All of the above. | e. | None of the above. |
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| 94. | Mycorrhizae benefits plants by: a. | increasing photosynthetic area. | b. | increasing absorptive surface area of roots. | c. | increasing chlorophyll content. | d. | increasing leaf area. | e. | None of the above. |
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| 95. | ____________________ cause enormous economic losses by decaying wood, both living trees and stored lumber. a. | Sac fungi | b. | Mushrooms | c. | Bracket fungi | d. | Aspergillus | e. | Rhizopus |
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| 96. | Consuming even a single mushroom of the genus _______________ can be fatal. a. | Agaricus | b. | Shottake | c. | Portobello | d. | Amanita | e. | Oyster |
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| 97. | _________________ is a fungal chemical that shows promise as an anticancer agent. a. | Pencillin | b. | Fumigallin | c. | Ergot compounds | d. | Psilocybin | e. | None of the above. |
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| 98. | Ergot compounds, produced by _____________________, are used as drugs to induce labor and to stop uterine bleeding. a. | Aspergillus tamari | b. | Claviceps purpurea | c. | Penicillium notatum | d. | Erwinia carotovora | e. | None of the above. |
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