Competitive Exams: Agriculture MCQs (Practice-Test 11 of 56)

  1. The problem of testing ver large number of inbred lines for their general combining ability in developing a double cross hybrid of maize could be best solved by using

    1. Test cross method

    2. Top cross method

    3. Diallele cross method

    4. Convergent selection method

  2. How many possible double cross hybrids could be made from ten inbred lines of maize?

    1. 40

    2. 80

    3. 160

    4. 630

  3. Ther ar certain basic requirements in selecting the component inbred lines of synthetic varieties in cross-llinated crops. One of the most important criteria is that these lines must have good

    1. Specific combining ability

    2. General combining ability

    3. Self-compatibility

    4. Inbreeding depression

  4. A hybrid obtained from a single cross crossed with an open pollinated variety is called

    1. Double top cross

    2. Double cross hybrid

    3. Dioecious

    4. Dichogamy

  5. In rice hybrid seed is produced by crossing

    1. A x B lines

    2. A x r lines

    3. B x r lines

    4. A x B x r lines

  6. Middle lamella occur in

    1. Animal cells

    2. Plant cells

    3. Bacterial cells

    4. Fungal cells

  7. In Drosophila melanogaster which ratio of X-romosome to autosomes (A) results into me tamales?

    1. IX: 2A

    2. 2X: 4A

    3. 2X: 3A

    4. IX: 3A

  8. In mammalian population the sex ratio of male: Female s 1: 1. The Reason for this is

    1. Heterogametic male

    2. Homogametic male

    3. Heterogametic female

    4. Homogametic female

  9. Match List I with List II and select the correct answer:

    List-I (Crop foundation seed) List-II (Isolation distance)
    1. rice

    2. Maize

    3. Bajra

    4. Sorghum

    1. 400 m

    2. 200 m

    3. 3m

    4. 1000m

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 4
      • 2
      • 4
      • 2
      • 3
      • 1
      • 3
      • 2
      • 4
      • 1
      • 4
      • 1
      • 3
      • 2
  10. The bread-eat (Triticum aestivum 2n = 42) varieties ar cytological

    1. Autopolyploid

    2. Complex poiyploids

    3. Segmental allopolyploids

    4. Octoploids

  11. Consider the following statements: PBW 343, a popular wheat variety of North-ster India belonging to Triticum aestivur has chromosome number 2n 42

    1. Has been derived from rye-eat crosses

    2. Is a hexaploid with genome formula AABBDD

    3. Has thicker and stouter stems, broader and thicker leaves with high yield potential

    4. Is grown as a composite variety

    Which of the above statements are correct?

    1. 1, 2 and 3

    2. 2 and 3

    3. 3 and 4

    4. 1 and 4

  12. Mixtur of isogenic lines in a selfpollinated crop is termed as

    1. Synthetic variety

    2. Multiline variety

    3. Com Positive variety

    4. Pur line variety

  13. TGMS and PGMS systems ar used for the production of

    1. Pur line varieties

    2. Composities

    3. Synthetics

    4. Hybrids

  14. Which one of the following terms correctly defines the phenomenon in which the crossing of two parental forms brings in an excessive, accidental, inadaptable and often unbalanced expression of an attribute?

    1. Phenorypic assortative mating

    2. Phenotypic disassortative mating

    3. random mating

    4. Luxuriance

  15. The sterility of interspecific/integeneric crosses can be overcome to produce hybrids by using the biotechnological tool of

    1. Anther culture

    2. Embryo culture

    3. Explant culture

    4. Pollen culture

  16. Which one of the following expresses the decreased vigour in terms of growth, survival or fecundity that follows one or mor generations of inbreeding?

    1. Heterokaryon

    2. Hybrid vigour

    3. Inbreeding depression

    4. Heterozygosity

  17. . Brassica juncea has been evolved after hybridization between

    1. B nigr and B campestris

    2. B nigr and B oleracea

    3. B campestris and B oleracea

    4. B campestris and B carinata

  18. Match List I with List II and select the correct answer:

    List-I (Fruit) List-II (Variety)
    1. Banana

    2. Sweet orange

    3. Pineapple

    4. Apple

    1. Pineapple

    2. Kew

    3. Winter banana

    4. Basrai

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 3
      • 2
      • 4
      • 1
      • 2
      • 3
      • 1
      • 4
      • 2
      • 3
      • 1
      • 4
      • 3
      • 2
  19. In India, which of the following fruits has the highest production?

    1. Mango

    2. Citrus

    3. Banana

    4. Grapes

  20. Late cauliflower to absence of does not set seed in plains due

    1. Long day and high temperature

    2. Long day and low temperature

    3. Shor day and high temperature

    4. Shor clay and low temperature

  21. Match List I with List II and select the correct answer:

    List-I (Disease) List-II (Crop)
    1. Late blight

    2. Canker

    3. Malformation

    4. Scab

    1. Apple

    2. Mango

    3. Potato

    4. Citrus

    • A
    • B
    • C
    • D
      • 3
      • 2
      • 4
      • 1
      • 1
      • 4
      • 2
      • 3
      • 3
      • 4
      • 2
      • 1
      • 1
      • 2
      • 4
      • 3
  22. Consider the following clonal rootstocks of apple:

    1. Mailing 9

    2. Mailing 4

    3. Mailing 16

    4. Mailing 27

    The correct sequence of placing these rootstocks in descending order in terms of their vigour is:

    1. 2, 1, 3, 4

    2. 3, 2, 1, 4

    3. 3, 4, 2, 1

    4. 1, 4, 2, 3

  23. Whiptail disorder of cauliflower is caused by the deficiency of

    1. Copper

    2. Boron

    3. Molybdenum

    4. Zinc

  24. Pusa Mukta, an improved variety of cabbage is resistant to

    1. White rot

    2. Black rot

    3. Downy mildew

    4. Powder mildew

  25. Which one of the following is the most significant featur of Japanese style of gardening?

    1. Abundance of ornamental trees

    2. Presence of statues and lanterns

    3. rower beds of various designs

    4. Attractive arrangement of rocks and stones

  26. Which one of the following states/regions is famous for the cultivation of orchids?

    1. Himachal Pradesh

    2. Uttaranchal

    3. N. E. Region

    4. Kerala

  27. Which one of the following is the largest exporter of medicinal and aromatic plant products in the world?

    1. USA.

    2. Germany

    3. China

    4. India

  28. Which one of the following pair is not correctly matched?

      • Sarpagandha
      • Root
      • Aswagandha
      • Stem
      • Cinchona
      • Bark
      • Mentha
      • Leaf
  29. Budding is the most commonly done when ther is

    1. Good sap flow in the plants

    2. No sap flow in the plants

    3. Early initiation of growth in the plants

    4. Late initiation of growth in the plants

  30. Which one of the following pair is not correctly matched?

      • Stone grafting
      • Mango
      • Cutting
      • Strawberry
      • Tongue grafting
      • Apple
      • Ring Budding
      • Jujube