Zoology - Reproduction in Organisms Book Back Questions

12th Standard EM

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Biology

Time : 01:00:00 Hrs
Total Marks : 30
    5 x 1 = 5
  1. In which type of parthenogenesis are only males produced?

    (a)

    Arrhenotoky

    (b)

    Thelytoky

    (c)

    Amphitoky

    (d)

    Both a and b

  2. Animals giving birth to young ones:

    (a)

    Oviparous

    (b)

    Oviviviparous

    (c)

    Viviparous

    (d)

    Both a and b

  3. The mode of reproduction in bacteria is by

    (a)

    Formation of gametes

    (b)

    Endospore formation

    (c)

    Conjugation

    (d)

    Zoospore formation

  4. 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.

  5. 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

  6. 3 x 2 = 6
  7. Name the phenomenon where the female gamete directly develops into a new organism with with an avian example

  8. What is parthenogenesis? Give two examples from animals.

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

  10. 3 x 3 = 9
  11. The unicellular organisms which reproduce by binary fission are considered immortal. Justify

  12. Why is the offspring formed by asexual reproduction referred as a clone?

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

  14. 2 x 5 = 10
  15. How is juvenile phase different from reproductive phase?

  16. What is the difference between syngamy and fertilization?

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