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Botany - Plant Breeding 1 Mark Creative Question Paper With Answer Key

12th Standard

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Biology

Time : 00:15:00 Hrs
Total Marks : 15

    Multiple Choice Question

    15 x 1 = 15
  1. ________is the process of bringing a plant species under human control.

    (a)

    Emasculation

    (b)

    Hybridization

    (c)

    Domestication

    (d)

    Acclimatization

  2. 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

  3. Identify the incorrect statement:

    (a)

    Bio-inoculants are efficient in solubilising phosphate

    (b)

    Bio-inoculants are ecofriendly organic agro outputs

    (c)

    Bio-inoculants are obtained from dead organic matters

    (d)

    Bio-inoculants are designed to improve soil fertility

  4. Which is not a free-living nitrogen-fixing species?

    (a)

    Azotobacter

    (b)

    Clostridium

    (c)

    Nostoc

    (d)

    Anabaena

  5. Arbuscular mycorrhizae is a symbiotic association between ____________

    (a)

    Algae and fungi

    (b)

    Angiosperm roots and fungi

    (c)

    Blue-green algae and Azolla fern

    (d)

    Cyanobacteria and corolloid root

  6. Azolla is best suited biofertilizer for _________

    (a)

    Sugar cane cultivation

    (b)

    Paddy cultivation

    (c)

    Wheat cultivation

    (d)

    Cotton cultivation

  7. 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

  8. Assertion (A): Pure line varieties show homozygosity.
    Reason (R): Pure line species are obtained through cross-pollination.

    (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

  9. Assertion (A): Hybrids show increased growth and elevated yield.
    Reason (R): F1 hybrids show Heterosis.

    (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

  10. Statement (1): Trichoderma species is a free-living bacteria.
    Statement (2): It acts as a potent bio-control agent

    (a)

    Statement 1 is correct and Statement 4 is incorrect

    (b)

    Statement 1 is incorrect and Statement 2 is correct

    (c)

    Both the statements are correct

    (d)

    Both the statements are incorrect

  11. 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

  12. Identify the proper sequence of hybridisation technique

    (a)

    Emasculation ⟶ Selection ⟶ Bagging ⟶ Crossing ⟶ Harvesting

    (b)

    Harvesting ⟶ Selection ⟶ Crossing ⟶ Emasculation ⟶ Bagging

    (c)

    Selection ⟶ Harvesting ⟶ Crossing ⟶ Emasculation ⟶ Bagging

    (d)

    Selection ⟶ Emasculation ⟶ Bagging ⟶ Crossing ⟶ Harvesting

  13. Intraspecific hybridization is also termed as __________ 

    (a)

    Intravarietal hybridization

    (b)

    Intervarietal hybridization

    (c)

    Interspecific hybridization

    (d)

    Intergeneric hybridization

  14. Superiority of hybrids over parents only in vegetative growth not in yield. This phenomenon is termed as ________

    (a)

    Euheterosis

    (b)

    Balanced euheterosis

    (c)

    Luxuriance

    (d)

    Mutational heterosis

  15. The term green revolution was coined by ___________

    (a)

    William S Gaud

    (b)

    M.S. Swaminathan

    (c)

    Dr. B.P. Pal

    (d)

    Dr. N.E. Borla

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