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Botany - Plant Breeding Practice Question Paper

12th Standard EM

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Biology

Time : 01:00:00 Hrs
Total Marks : 40
    8 x 1 = 8
  1. The quickest method of plant breeding is

    (a)

    Introduction

    (b)

    Selection

    (c)

    Hybridization

    (d)

    Mutation breeding

  2. Jaya and Ratna are the semi dwarf varieties of

    (a)

    wheat

    (b)

    rice

    (c)

    cowpea

    (d)

    mustard

  3. Match list I with list II

    List I List II
    Biofertilizer Organisms
    i) Free living N2 a) Aspergillus
    ii) Symbiotic N2 b) Amanita
    iii) P Solubilizing c) Anabaena azollae
    iv) P Mobilizing d) Azotobactor
    (a)

    ic, iia, iiib, ivd

    (b)

    id, iic, iiia, ivb.

    (c)

    ia, iic, iiib, ivd

    (d)

    ib, iia, iiid, ivc

  4. Which of the following scientist developed world's first cotton hybrid?

    (a)

    Dr. B.P. Pal

    (b)

    C.T. Patel

    (c)

    Dr. K. Ramiah

    (d)

    N.G.P. Rao

  5. Assertion (A): SLF promotes vigorous growth and provide resistance against diseases.
    Reason (R): SLF is made from kelp containing more than 70 minerals.

    (a)

    Both A and R are true. R explains A.

    (b)

    A is true R is false

    (c)

    A is false R is true.

    (d)

    Both A and R are false

  6. Statement (1): Clonal selection is carried out in asexually propagating plants.
    Statement (2): Clones show similar genotypes.

    (a)

    Statement 1 is correct and Statement 2 is incorrect

    (b)

    Statement 1 is incorrect and Statement 2 is correct

    (c)

    Both the statements are correct

    (d)

    Both the statements are incorrect

  7. Pusa swarnim variety of Brassica species show resistance to ___________

    (a)

    White rust

    (b)

    Leaf curl

    (c)

    Black rot

    (d)

    Hill bunt

  8. Damping off of tomato is controlled by

    (a)

    Beauveria species

    (b)

    Trichoderma species

    (c)

    Acacia species

    (d)

    Pseudomonas species

  9. 1 x 1 = 1
  10. The period of opening of a flower is___________

    ()

    Anthesis

  11. 3 x 2 = 6
  12. What are bio-pesticides? Why they are considered better than synthetic pesticides?

  13. What is Heterosis?

  14. What is Biofortification?

  15. 5 x 3 = 15
  16. Explain the best suited type followed by plant breeders at present?

  17. How Rhizobium acts as an efficient bio- fertiIizer?

  18. Write a note on Green Manuring.

  19. Write a short note on autopolyploidy with an example.

  20. State the objective of using green manuring.

  21. 2 x 5 = 10
  22. List out the new breeding techniques involved in developing new traits in plant breeding.

  23. Explain the steps involved in hybridization.

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