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COMPARATIVE CHARACTERISTICS OF SOME CLASSES OF FUNGI
Answer to MCQ 1. Fungal mitosis is unusual in that a. it occurs without spindle fibers b. it resembles plant meiosis, having a reduction division c. it results in clusters of chromosomes without a nuclear membrane d. it takes place within the nucleus 2. Mushrooms and puffballs appear rapidly because of a. rapid cell division b. rapid elongation of hyphae c. rapid water absorption d. rapid multiplication and inflation of vacuoles 3. Deuteromycetes are called imperfect fungi because a. the sexual cycle has not been observed b. nothing about them indicates their relation to other fungi c. they do not produce mycelia d. they have no asexual reproduction 4. Most ectomycorrhizae are a. Ascomycetes b. Deuteromycetes c. Zygomycetes d. Basidiomycetes 5. Fungi reproduce sexually with a. swimming gametes b. nuclear exchange c. nonflagellate gametes d. parthenogenesis 6. Zygomycete hyphae are unique in that they a. have perforated septa b. are monokaryotic c. are dikaryotic d. lack septa e. have solid septa 7. The _______________ are not basidiomycetes a. Toadstools b. Puffballs c. Morels d. shelf fungi e. mushrooms 8. Parasexuality occurs a. within heterokaryotic hyphae b. between dikaryotic hyphae c. between homokaryotic hyphae d. between heterokaryotic hyphae e. only in yeasts 9. Fungi are virtually the only organism capable of breaking down a. Cellulose b. Lignin c. Oil d. Chiti e. Starch 10. Basidiospores are borne on the ends of a. primary mycelia b. basidiocarps c. trichogynes d. sterigmata e. secondary mycelia 11. Conidia are multinucleate spores produced in a. Gametangia b. Basidia c. Sporangia d. Asci e. none of the above 12. Athlete's foot is caused by a member of the a. Yeasts b. Fungi Imperfecti c. Endomycorrhizae d. Basidiomycetes e. Zygomycetes 13. Fungi regulate the formation of microtubules during mitosis with a. basal bodies b. centromeres c. centrioles d. spindle plaques e. heterochromatin 14. The cells of the secondary mycelium of basidiomycetes have _______________ nuclei. a. Many b. 16 c. 8 d. 4 e. 2 15. In the zygomycetes, most spores are produced by a. somatic meiosis b. mitosis c. syngamy d. zygotic meiosis e. sporic meiosis 16. Asexual reproduction occurs in _______________ by sporangia. a. Yeasts b. Basidiomycetes c. Ascomycetes d. imperfect fungi e. zygomycetes 17. Most yeast reproduction occurs by a. Budding b. Conidia c. Syngamy d. Ascospores e. Basidiospores 18. The fungal components of lichens are mostly a. Basidiomycetes b. Fungi Imperfecti c. Ascomycetes d. Zygomycetes e. Mycorrhizae 19. Oomycetes are distinguished from fungi by all of the characteristics below except a. source of nutrition b. spore motility c. cellulose walls d. pattern of mitosis e. diploid hyphae 20. Fungi have been incorrectly classified as plants because of their a. types of chlorophyll b. immobility c. cell wall composition d. mitotic activity e. gametes 21. Cell walls of fungi are composed primarily of a. Lignin b. Cellulose c. Chitin d. Pectin e. Glycoprotein 22. Male gametes of ascomycetes enter the female gametangium by way of the a. Ascogonium b. Antheridium c. Thrichogyne d. Ascopore e. Hyphae 23. Fungi Imperfecti includes members of a. Ascomycetes b. Basidiomycetes c. Zygomycetes d. all of the above e. none of the above 24. Fungi most resemble plants in their a. Immobility b. cell walls c. sexuality d. food acquisition e. basic three dimensionality 25. Fungal hyphae with two genetically distinct nuclei are said to be a. Polykaryotic b. Monokaryotic c. Dikaryotic d. Karyotic e. Heterokaryotic 26. Fungi are classified into phyla primarily on differences in: a. reproductive structures. b. number of nuclei per cell. c. cell wall composition. d. preferred habitat of growth. e. mode of locomotion. 27. With respect to the life cycle of mushroom-producing basidiomycete, which of the following structures is haploid? a. monokaryotic hypha b. basidiospore c. basidium d. clamp connection e. more than one of the structures above are haploid 28. Fungi are different from plants because fungi: a. are heterotrophs b. have filamentous bodies c. have cell walls made of chitin d. have nuclear mitosis e. all of the above 29. Which of the following is a reproductive structure of a fungus? a. Gametangia b. Sporangia c. Conidia d. all of the above e. none of the above 30. Which one of the following groups of fungi has not been observed to reproduce sexually? a. Ascomycota b. Imperfect fungi c. Basidiomycota d. Zygomycota e. both a and c 31. In which phylum of fungi does the fusion of hyphae lead directly to the formation of a zygote? a. Ascomycota b. Imperfect fungi c. Basidiomycota d. Zygomycota e. all of the above 32. The common mushroom or toadstool belongs to the phylum: a. Ascomycota b. Imperfect fungi c. Basidiomycota d. Zygomycota e. none of the above 33. When hyphae of basidiomycetes fuse in sexual reproduction, the resulting cell can best be called a: a. Monokaryon b. Dikaryon c. Homokaryon d. Basidiocarp e. none of the above 34. The imperfect fungi include organisms related to a. Penicillin b. the fermentation of soy sauce c. athlete's foot d. the flavor of Roquefort cheese e. all of the above 35. A lichen is a highly integrated mutualistic association between two different fungi. a. True b. False 36. The deuteromycetes are an artificial collection of fungi that are probably not very closely related a. True b. False 37. Hyphae are made up of a long string of cells, separated by septa, that prevents the mixing of cytoplasm between cells. a. True b. False 38. Lichens are a special fungus belonging to the phylum Ascomycota. a. True b. False 39. All yeasts are single-celled organisms derived from the phylum Zygomycota. a. True b. False 40. The button mushroom some of us put on our pizza is a basidiocarp. a. True b. False
Theme 23 Date: 2016-01-03; view: 1029
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