Competitive Exams: Botany MCQs (Practice-Test 40 of 104)

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

      • Tikka disease of groundnut
      • Cercospora personata
      • Blast of rice
      • Ephelis oryzae
      • Red rot of sugar-cane
      • Collectotrichum falcatum
      • Early blight of potato
      • Alternaria solani
  2. Which one of the following is a copper fungicide?

    1. Bordeaux mixture

    2. Carboxin

    3. Chloropicrin

    4. Mercuric chloride

  3. Which one of the following pairs is not correctly matched?

      • Flag smut of wheat
      • Ustilago nuda tritici
      • Karnal bunt of wheat
      • Tilletia barclayana
      • Brown rust of wheat
      • Puccinia recondite
      • Powdery mildew of wheat
      • Erysiphe graminis
  4. Consider the following statements: Biological control through antagonism involves

    1. Amensalism

    2. Competition

    3. Parasitism

    4. Predation

    Which of the statements given above are correct?

    1. 1 and 2 only

    2. 2, 3 and 4 only

    3. 1, 3 and 4 only

    4. 1, 2, 3 and 4

  5. Which one of the following plants gives palmarosa oil?

    1. Cymbopogan martini

    2. Dryopteris filix-mas

    3. Ferula asafetida

    4. Terminalia chebula

  6. The family Ephedraceae, having ephedrine producing plants, belongs to

    1. Algae

    2. Bryophytes

    3. Gymnosperms

    4. Angiosperms

  7. Which one of the following algae is an important source of mannitol?

    1. Chlorella

    2. Gelidium

    3. Laminaria

    4. Sargassum

  8. Which one of the following plants is considered as a potential petro-crop?

    1. Euphorbia tirucalli

    2. Jatropha curcas

    3. Pongamia glabra

    4. Ricinus communis

  9. Ipomea batatas is propagated vegetatively by using:

    1. Bulbs

    2. Corms

    3. Tubers

    4. Vine cuttings

  10. Match List I (Forest type) with List II (Plant association) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Alpine

    2. Tropical thorn

    3. Tropical dry deciduous

    4. Tropical wet evergreen

    1. Dipterocarpus

    2. Abies

    3. Acacia

    4. Tectona

    • A
    • B
    • C
    • D
      • 1
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 2
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 1
  11. Consider the following plants:

    1. Bruguiera

    2. Eugenia

    3. Kandelia

    4. Schima

    Which of the above are mangrove trees?

    1. 1 and 2

    2. 1 and 3 only

    3. 2, and 4

    4. 1, 3 and 4

  12. Which of the following chemicals is/are used in seed viability testing?

    1. Orcine and water

    2. Uric acid & gibberellic acid

    3. Tetrazolim chloride

    4. Colchicin and water

  13. Which one of the following is the purpose of adding agar in the medium for tissues culture?

    1. Enrichment of macronutrients

    2. Maintenance of pH

    3. Solidification of the medium

    4. Supply of energy for growth

  14. Match List I (Wildlife sanctuary) with List II (State) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Bandipur wildlife sanctuary

    2. Buxa wildlife sanctuary

    3. Namdapha wildlife sanctuary

    1. Arunachal Pradesh

    2. Karnataka

    3. Madhya Pradesh

    4. West Bengal

    • A
    • B
    • C
      • 2
      • 3
      • 1
      • 2
      • 4
      • 1
      • 1
      • 3
      • 2
      • 1
      • 4
      • 2
  15. The callus is defined as:

    1. Decaying cells

    2. Differentiated cells

    3. Sterile mass of cells

    4. Undifferentiated mass of cells