Plant & Fungal Parasites Quiz Questions

51 Questions | Total Attempts: 278

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Plant & Fungal Parasites Quiz Questions

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Questions and Answers
  • 1. 
    Which of the following is a true statement concerning nematodes?
    • A. 

      There are 15 million species of nematodes; 100,000 are plant parasites.

    • B. 

      There are 1500 species. All of these are animal parasites, with the exception of ten, which are plant parasites.

    • C. 

      There are 15,000 species, most are free-living, but about 100 are plant parasites.

    • D. 

      There are 150,000 species, none are free-living. All nematodes are plant parasites.

    • E. 

      None of the above.

  • 2. 
    Which of the following is NOT a normal feature of soybean roots? 
    • A. 

      Root tips

    • B. 

      Root hairs

    • C. 

      Leguminous nodules

    • D. 

      Cysts

    • E. 

      None of these should be present on the healthy soybean root

  • 3. 
    Which of the following are examples of holoparasites? 
    • A. 

      Dodder (Cuscuta spp.)

    • B. 

      Witchweed (Striga spp.)

    • C. 

      Broomrape (Orobanche spp.)

    • D. 

      Both (a) and (c) are correct.

    • E. 

      All of the above are holoparasites.

  • 4. 
    "Watersoaking" and "wilting" of plants results from thawing after freezing temperatures because: 
    • A. 

      Cold temperatures cause irreversible denaturation of enzymes.

    • B. 

      Cold temperatures cause disruptions in photosynthesis (because of damage to thylakoid membranes).

    • C. 

      Protoplasts and apoplast freeze; ice crystals form, cell membranes rupture.

    • D. 

      All of the above are true.

    • E. 

      None of the above are true.

  • 5. 
    Plant-microbe interactions are dynamic. 
    • A. 

      True

    • B. 

      False

  • 6. 
    Which of the following are PREFORMED, MECHANICAL barriers to pathogen infection? 
    • A. 

      Cuticle

    • B. 

      Trichomes on plant surfaces

    • C. 

      Small stomates

    • D. 

      All of the above

    • E. 

      None of the above

  • 7. 
    Which of the following is an example of a flavonoid phytoalexin? 
    • A. 

      Rishitin (produced by potato plants)

    • B. 

      Pisatin (produces by pea plants)

    • C. 

      Gossypol (produced by cotton plants)

    • D. 

      Farnesyl pyrophosphate (produced by many plants)

    • E. 

      None of the above.

  • 8. 
    Some plant parasitic nematodes have a muscular pumping organ associated with their esophogus. This is called a: 
    • A. 

      Cuticle

    • B. 

      Stylet

    • C. 

      Migratory endoparasite

    • D. 

      metacorpus (median bulb)

    • E. 

      None of the above

  • 9. 
    Damage to roots by lesion nematodes can result in:
    • A. 

      Damage to roots and associated organs by secondary pathogens

    • B. 

      Stunting, chlorosis, and wilt above-ground

    • C. 

      All of the above

    • D. 

      None of the above

  • 10. 
    Dodder (Cuscuta spp.) (we did not talk about this in class as much this year)
    • A. 

      Geographic range = Western U.S., Great Lakes, Canada

    • B. 

      Geographic range = Entire U.S.

    • C. 

      Geographic range = Eastern U.S. only

  • 11. 
    Dwarf mistletoe (Arceuthobium spp.) 
    • A. 

      Geographic range = Western U.S., Great Lakes, Canada

    • B. 

      Geographic range = Entire U.S.

    • C. 

      Geographic range = Eastern U.S. only

  • 12. 
    Neutral pH favors uptake of __________ and _________; whereas, slightly acidic soils favor uptake of __________. 
    • A. 

      Iron, phosphorus; nitrogen

    • B. 

      Nitrogen, phosphorus; iron

    • C. 

      Nitrogen, iron; phosphorus

    • D. 

      None of the above are correct.

    • E. 

      More than one of the above are correct, but not all three.

  • 13. 
    Obligate saprophyte + phyllosphere =
    • A. 

      Disease

    • B. 

      No disease

  • 14. 
    Mutualist + Host = 
    • A. 

      Disease

    • B. 

      No disease

  • 15. 
    Pathogen + Non-host =
    • A. 

      Disease

    • B. 

      No disease

  • 16. 
    Pathogen + Susceptible Host =
    • A. 

      Disease

    • B. 

      No disease

  • 17. 
    Pathogen + Resistant Host 
    • A. 

      Disease

    • B. 

      No disease

  • 18. 
    Which of the following are PREFORMED, CHEMICAL barriers to pathogen infection? 
    • A. 

      Simple phenols/phenolic acids

    • B. 

      Cyanogenic glycosides

    • C. 

      Lactones

    • D. 

      Saponins

    • E. 

      All of the above

  • 19. 
    Successful induced plant defense can be associated with: 
    • A. 

      The formation of a lignituber

    • B. 

      the formation of a lignituber and then subsequent intracellular growth of advancing hyphae

    • C. 

      The formation of tyloses

    • D. 

      Slow or minimal deposition of callose

    • E. 

      Both "a" and "c" are correct

  • 20. 
    How many larval stages occur with most plant parasitic nematodes? 
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

    • E. 

      5

  • 21. 
    Which description fits the lesion nematode?
    • A. 

      Migratory, endoparasitic

    • B. 

      Sedentary, endoparasitic

    • C. 

      Aerial, endoparasitic

    • D. 

      Migratory, ectoparasitic

    • E. 

      Sedentary, ectoparasitic

  • 22. 
    Facultative parasite =
    • A. 

      Parasitic flowering plant that contains chlorophyll when mature and obtains water and mineral nutrients by connecting to the host plant's xylem by a haustorium.

    • B. 

      Organism that is normally saprophytic but is capable of being parasitic.

    • C. 

      Parasitic flowering plant that lacks chlorophyll and must rely totally on the contents of the xylem and phloem of the host plant.

    • D. 

      Organism that can grow only as a parasite in association with its host plant and cannot be grown in artificial culture media.

    • E. 

      An organism that synthesizes its nutritive substances from inorganic molecules.

  • 23. 
    Obligate parasite =
    • A. 

      Parasitic flowering plant that contains chlorophyll when mature and obtains water and mineral nutrients by connecting to the host plant's xylem by a haustorium.

    • B. 

      Organism that is normally saprophytic but is capable of being parasitic.

    • C. 

      Parasitic flowering plant that lacks chlorophyll and must rely totally on the contents of the xylem and phloem of the host plant.

    • D. 

      Organism that can grow only as a parasite in association with its host plant and cannot be grown in artificial culture media.

    • E. 

      An organism that synthesizes its nutritive substances from inorganic molecules.

  • 24. 
    Hemiparasite =
    • A. 

      Parasitic flowering plant that contains chlorophyll when mature and obtains water and mineral nutrients by connecting to the host plant's xylem by a haustorium.

    • B. 

      Organism that is normally saprophytic but is capable of being parasitic.

    • C. 

      Parasitic flowering plant that lacks chlorophyll and must rely totally on the contents of the xylem and phloem of the host plant.

    • D. 

      Organism that can grow only as a parasite in association with its host plant and cannot be grown in artificial culture media.

    • E. 

      An organism that synthesizes its nutritive substances from inorganic molecules.

  • 25. 
    Holoparasite =
    • A. 

      Parasitic flowering plant that contains chlorophyll when mature and obtains water and mineral nutrients by connecting to the host plant's xylem by a haustorium.

    • B. 

      Organism that is normally saprophytic but is capable of being parasitic.

    • C. 

      Parasitic flowering plant that lacks chlorophyll and must rely totally on the contents of the xylem and phloem of the host plant.

    • D. 

      Organism that can grow only as a parasite in association with its host plant and cannot be grown in artificial culture media.

    • E. 

      An organism that synthesizes its nutritive substances from inorganic molecules.

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