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12th Standard English Medium Biology (Botany) Subject Creative 3 Mark Questions with Solution Part - II

12th Standard

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Biology

Time : 01:00:00 Hrs
Total Marks : 15

    3 Marks

    25 x 3 = 75
  1. A mature female gametophyte (embryo sac/egg apparatus) of angiosperms is 7 celled with 8 nucleus. Name the individual cells and mention their count.

  2. Geitonogamy is similar to autogamy. Justify the statement.

  3. Give a brief account on pollination process in Zea mays.

  4. Enumerate the characters of ornithophilous flowers.

  5. Observe the picture and answer the questions.
    (a) Label the part - A
    (b) Name the types of vegetative propagule
    (c) Give one example for such type of vegetative propagule

  6. State the law of segregation.

  7. Give an account on cytoplasmic male sterility.

  8. In the chart given below, 'AA' are the genes located in a chromosome of Pisum sativum.
    Observe the chart and mention the genetic phenomenon does it indicates.

  9. Explain how fermentation is done in bioreactor ?

  10. What is SCP? Mention its nutritional value.

  11. Though SCP is a rich protein source, it has not been widely used as food supplement. Point a reason to support this statement.

  12. Write a brief note on Biolistics.

  13. What is antibiotic resistant marker.

  14. What does the terms specification and claim refers with respect to patents?

  15. Write any three points that you know about Genetic Engineering Appraisal Committee (GEAC).

  16. Study the process given below and mention the phenomena A and B
    (a) Meristematic tissue \(\overset { A }{ \longrightarrow } \) Permanent tissue
    (b) Callus \(\overset { B }{ \longrightarrow } \) Embryoid

  17. Direction of mountain determines the richness of vegetation - Justify.

  18. Discuss on predator - prey interaction with example.

  19. Spindle shaped pyramid of number is noticed in forest ecosystem. Give reasons.

  20. What does the term 'Eluviation' stands for?

  21. Give a detailed account on clean development mechanism.

  22. Prosopis juliflora, though an alien invasive species to India, it is beneficial to certain extent. Give reason.

  23. Mention the ways in which mangoes are used in Indian culinary.

  24. What are organic pesticides?

  25. Complete the statements.
    (a) Alphonsa is a variety of_________
    (b) Cayenne pepper is a variety of __________

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