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Important 2 Mark Book Back Questions (New Syllabus) 2020

12th Standard EM

    Reg.No. :


Time : 01:00:00 Hrs
Total Marks : 46

    Part A

    23 x 2 = 46
  1. Name the phenomenon where the female gamete directly develops into a new organism with with an avian example

  2. Expand the acronyms
    a. FSH
    b. LH
    c. hCG
    d. hPL

  3. Select the correct term from the bracket and complete the given branching tree

    (Barriers, Lactational amenorrhoea, CuT, Tubectomy)

  4. What is haplodiploidy?

  5. Name the parts marked ‘A’ and ‘B’ in the given transcription unit:

  6. Explain the three major categories in which fossilization occur?

  7. What are interferons? Mention their role.

  8. Give any two bioactive molecules produced by microbes and state their uses.

  9. What is genetically engineered Insulin?

  10. What is Pedogenesis?

  11. What are the three levels of biodiversity?

  12. Expand
    (i) CFC
    (ii) AQI
    (iii) PAN

  13. Mention the contribution of Hofmeister towards Embryology.

  14. What is meant by true breeding or pure breeding lines / strain?

  15. If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F1 hybrid. Now you cross F1 male with double recessive female.
    i) What type of linkage is seen?
    ii) Draw the cross with correct genotype.
    iii) What is the possible genotype in F2 generation?

  16. You are working in a biotechnology lab with a becterium namely E.coli. How will you cut the nucleotide sequence? explain it.

  17. What is the name of the process given below? Write its 4 types.

  18. ‘Green algae are not likely to be found in the deepest strata of the ocean’. Give at least one reason.

  19. Pyramid of energy is always upright. Give reasons

  20. Give four examples of plants cultivated in commercial agroforestry.

  21. How are microbial innoculants used to increase the soil fertility?

  22. Discuss which wood is better for making furniture.

  23. How does immune system work?


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