Important multiple choice questions chapter one

12th Standard EM

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

    (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. 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.

  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

    (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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