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Botany - Plant Breeding - Two Marks Study Materials

12th Standard

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Biology

Time : 00:45:00 Hrs
Total Marks : 30
    15 x 2 = 30
  1. What is meant by domestication of plants?

  2. Mention any two free-living nitrogen-fixing bacteria.

  3. What are bio-pesticides? Why they are considered better than synthetic pesticides?

  4. Name any four plants used in Green leaf manuring

  5. Define acclimatization.

  6. Define the following terms:
    (a) Emasculation (b) Bagging

  7. Define Heterosis?

  8. What does the term 'luxuriance' stands for in plant breeding? Explain.

  9. Mutagens are the substances that induces mutation. Name any two physical and chemical mutagens.

  10. Write in brief about Atomic Garden.

  11. State anyone advantage and one disadvantage of polyploid breeding.

  12. What are polyploids? Mention its nature.

  13. Name any two allopolyploid plant species

  14. What is Biofortification?

  15. Name the insect resistant varieties developed in the following crops.
    (a) Okra (b) Rapeseed mustard.

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