Competitive Exams: Botany MCQs (Practice-Test 71 of 104)

  1. Which one of the following pairs is NOT correctly matched?

      • Wart disease
      • Synchytrium of potato endobioticum
      • Soft rot of
      • Phytomonas ricinii of wheat ears
      • Bacterial rot
      • Phytomonas ricinii of wheat ears
      • Late blight
      • Phytophthora infections of potato
  2. Bordeaux mixture consists of

    1. Copper sulphate and calcium oxide

    2. Copper carbonate and copper sulphate

    3. Copper sulphate and calcium hydroxide

    4. Copper sulphate and calcium chloride

  3. Consider the following organisms:

    1. Viruses

    2. Bacteria

    3. Mycoplasmas

    4. Fungi

    The correct chronological sequence in which they were, recognized as incidents of plant diseases is

    1. 1, 2, 3, 4

    2. 4, 2, l, 3

    3. 4, 1, 3, 2

    4. 1, 4, 2, 3

  4. Consider the following stages:

    1. Spermogonial

    2. Aecial

    3. Uredial

    4. Teial

    5. Basidial

    The correct sequene of these stages in the life cycle of Puccinia graminis tritici is

    1. 2, 1, 4, 3, 5

    2. 1, 2, 4, 5, 3

    3. 1, 2, 3, 4, 5

    4. 2, 1, 4, 5, 3

  5. Which one of the following antagonists has been commercialized for the biological control of plant diseases?

    1. Peniophora gigantea

    2. Streptomyces rochii

    3. Bacillus subtilis

    4. Aspergillus flavus

  6. The major effect of crown gall pathogen on its hosts is the

    1. Yellowing of leaves and stem

    2. Stunted growth

    3. Hyperplasia and hypertrophy

    4. Matting or foots with small tubercles

  7. Which one of the following statements is incorrect?

    1. Tobacco is obtained from the seeds of Nicociana tobacco

    2. Rubber is obtained from the latex of some trees

    3. Fruits of Embolic officials are eaten raw and in pickled form

    4. Tectona grandis yields good timber

  8. Which one of the following sets of plant show/have shown promise as potential hydrocarbon (petroleum) sources?

    1. Simmondsia chinensis, Euphorhia ahvssinica, E. Teracalli

    2. Hardwockia pinnata, Capaifera longsdorfii, Euphorbia esinifera

    3. Capaifera multijuga, Euphrobia lathyrus, caloropis procera

    4. Sesamum indicum, Linum usitatissimum, Arachis hypogea

  9. Consider the following plants:

    1. Cannabis

    2. Leucaeno leucocephala

    3. Morux albci

    4. Cocos nucifera

    Among these the one (s) which can be called multipurpose plant (s) would include

    1. 4 alone

    2. 1, 2 and 3

    3. 1, 2 and 4

    4. 1, 2, 3 and 4

  10. Match List I with List II and select the correct answer using the codes given below the lists:

    List-I (Economic product) List-II (Botanical name of the plant)
    1. Jojoba wax

    2. Vegetable ivory

    3. Palm Oil

    4. Guayule rubber

    1. Phytelephas macrocarpa

    2. Simmondsia chinensis

    3. Hevea braziliensis

    4. Elaeis guineensis

    5. Parthenium argentatum

    • A
    • B
    • C
    • D
      • 1
      • 3
      • 4
      • 5
      • 2
      • 1
      • 5
      • 3
      • 2
      • 1
      • 4
      • 5
      • 1
      • 2
      • 5
      • 3
  11. A rough outline map of the North-Eastern. Part of India is shown in the given figure. The area labeled ‘Y’ in the map represents a biosphere reserve at

    1. Namdapha

    2. Silent valley

    3. Kaziranga

    4. Manas

  12. What is the correct sequence of the microorganisms involved in the decomposition of plant residues in the terrestrial ecosystems?

    1. Actinomycetes

    2. Spore producing bacteria

    3. Mould fungi and no spore producing bacteria

    4. Cellulose mycobacterium

    Select the correct answer using the codes given below:

    Codes:

    1. 3, 2, 4, 1

    2. 3, 2, 1, 4

    3. 2, 3, 1, 4

    4. 2, 3, 4, 1

  13. Moss-Lichen community is found in the latitude range of

    1. 40 to 60 degrees

    2. 60 to 80 degrees

    3. 20 to 40 degrees

    4. 0 to 20 degrees

  14. Nepenthes khasiana is a/an

    1. Fungicidal and wetland plant

    2. Insectivorous and endangered plant

    3. Fungicidal and endangered plant

    4. Insectivorous and wetland plant

  15. Virus-free plants can be produced by

    1. Ovule culture

    2. Anther culture

    3. Stem tip culture

    4. Leaf explants culture