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Reproduction in Organisms Important Questions

12th Standard EM

    Reg.No. :
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Biology

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
    Reason: Asexual reproduction involves only mitosis and no meiosis

    (a)

    both A and R are true and R is correct explanation for A

    (b)

    If both A and R are true but R is not the correct explanation for A

    (c)

    If A is true but R is false

    (d)

    If both A and R are false.

  2. Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Viviparous animals give better protection to their off springs.
    Reason: They lay their eggs in the safe places of the environment

    (a)

    If both A and R are true and R is correct explanation for A

    (b)

    If both A and R are true but R is not the correct explanation for A

    (c)

    If A is true but R is false

    (d)

    If both A and R are false

  3. Plasmotomy is observed in ________

    (a)

    Giant Amoeba

    (b)

    Hydra

    (c)

    Plasmodium

    (d)

    Ceratium

  4. Giant Amoeba refers to ______

    (a)

    Opalina

    (b)

    Pelomyxa

    (c)

    Ceratium

    (d)

    Trichonympha

  5. Budding is seen in ______

    (a)

    Noctiluca

    (b)

    Amoeba

    (c)

    Nostoc

    (d)

    Planaria

  6. 5 x 2 = 10
  7. Name the phenomenon where the female gamete directly develops into a new organism with with an avian example

  8. Which type of reproduction is effective -Asexual or sexual and why?

  9. What is peculiar about the cell division of paramecium?

  10. What is plasmotomy?

  11. Mention the phases in the life cycle of an organism.

  12. 5 x 3 = 15
  13. Why is the offspring formed by asexual reproduction referred as a clone?

  14. Why are the offsprings of oviparous animal at a greater risk as compared to offsprings of viviparous organisms?

  15. Explain multiple fission in plasmodium.

  16. Explain encystment in amoeba.


  17. (i) Identify the Process
    (ii) Name the Organism

  18. 4 x 5 = 20
  19. Differentiate between the following:
    (a) Binary fission in amoeba and multiple fission in Plasmodium
    (b) Budding in yeast and budding in Hydra
    (c) Regeneration in lizard and Planaria

  20. How is juvenile phase different from reproductive phase?

  21. Explain parthenogenesis.

  22. Write notes on binary fission in animals.

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