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Important multiple choice questions chapter one

12th Standard

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Biology

Use blue pen only
Time : 00:20:00 Hrs
Total Marks : 20

    Part - A

    Answer all the following questions


    20 x 1 = 20
  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 which mode of reproduction variations are seen _____.

    (a)

    Asexual

    (b)

    Parthenogenesis

    (c)

    Sexual

    (d)

    Both a and b

  5. 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) : In bee society, all the members are diploid except drones.
    Reason (R) : Drones are produced by parthenogenesis
    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. 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.

  7. 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

  8. Transverse Binary fission is seen is ______

    (a)

    Vorticella

    (b)

    Paramecium

    (c)

    Plasmodium

    (d)

    Euglena

  9. In, dinoflagellates the types of asexual reproduction seen is _____

    (a)

    Simple Binary fission

    (b)

    Multiple fission

    (c)

    Oblique binary fission

    (d)

    Longitudinal binary fission

  10. Multiple fission is seen in _______

    (a)

    Vorticella and ceratium

    (b)

    Plasmodium and paramecium

    (c)

    Amoeba and cyanobacteria

    (d)

    Vorticella and plasmodium

  11. During favourable conditions ______ shows multiple fission.

    (a)

    Plasmodium

    (b)

    Amoeba

    (c)

    Planaria

    (d)

    Euglena

  12. Plasmotomy is observed in ________

    (a)

    Giant Amoeba

    (b)

    Hydra

    (c)

    Plasmodium

    (d)

    Ceratium

  13. Giant Amoeba refers to ______

    (a)

    Opalina

    (b)

    Pelomyxa

    (c)

    Ceratium

    (d)

    Trichonympha

  14. ______ is seen in Aurelia.

    (a)

    Binary fission

    (b)

    Regeneration

    (c)

    Sporulation

    (d)

    Strobilation

  15. Budding is seen in ______

    (a)

    Noctiluca

    (b)

    Amoeba

    (c)

    Nostoc

    (d)

    Planaria

  16. Gemmules are ______

    (a)

    Exogenous growth

    (b)

    Daughter nuclei

    (c)

    Internal buds

    (d)

    Regenerated parts

  17. Regeneration is not seen in ______

    (a)

    Starfish

    (b)

    Lizard

    (c)

    Hydra

    (d)

    Sea Anemone

  18. Autogamy is seen in ______

    (a)

    Paramecium

    (b)

    Plasmodium

    (c)

    Hydra

    (d)

    Amoeba

  19. If the entire organism behaves as a gamete the Phenomenon is called _____

    (a)

    Autogamy

    (b)

    Syngamy

    (c)

    Morphallaxis

    (d)

    Hologamy

  20. Conjugation is a type of ______

    (a)

    Asexual reproduction

    (b)

    Autogamy

    (c)

    External fertilization

    (d)

    Sexual reproduction

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