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Zoology - Reproduction in Organisms Book Back Questions

12th Standard

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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 sexual reproduction in bacteria is by ______.

    (a)

    Formation of gametes

    (b)

    Endospore formation

    (c)

    Conjugation

    (d)

    Zoospore formation

  4. 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 (A): Offsprings produced by asexual reproduction are genetically identical to the parent.
    Reason(R): Asexual reproduction involves only mitosis and no meiosis.
    Codes:
    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.

    (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.
    Codes:
    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.

    (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 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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