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12th Standard EM

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Biology

Dont scribble
Time : 00:20:00 Hrs
Total Marks : 20

    Part - A

    Answer each question given below

    20 x 1 = 20
  1. The gravid proglottids are cut off from the parent body in ______

    (a)

    Tapeworm (Taenia solium)

    (b)

    Liver fluke

    (c)

    Planaria

    (d)

    Blood fluke

  2. Regeneration was first studied by _______

    (a)

    A.G. Tansley

    (b)

    Charles Bonnet

    (c)

    Abraham Trembley

    (d)

    Walter Gilbert

  3. Regeneration was first studied in _______

    (a)

    star fish

    (b)

    Planaria

    (c)

    Hydra

    (d)

    Aurelia

  4. Starfish shown ______ type of regeneration.

    (a)

    epimorphosis - reparative

    (b)

    epimorphosis (restorative)

    (c)

    morphallaxis

    (d)

    paedogenesis

  5. The sexual union of young individuals produced immediately after the division of the parent Cellis called _____

    (a)

    Paedogamy

    (b)

    hologamy

    (c)

    merogamy

    (d)

    isogamy

  6. ______ refers to the fusion of small sized, morphologically different gametes.

    (a)

    Isogamy

    (b)

    Hologamy

    (c)

    Paedogamy

    (d)

    Merogamy

  7. Fusion of morphologically and physiologically similar gametes is called ______

    (a)

    anisogamy

    (b)

    hologamy

    (c)

    isogamy

    (d)

    merogamy

  8. Exchange of certain amount of nuclear material during sexual reproduction is called _______

    (a)

    strobilation

    (b)

    conjugation

    (c)

    pedal laceration

    (d)

    sporulation

  9. Paedogenetic parthenogenesis is seen in ______

    (a)

    planula larvae of enidarians

    (b)

    Cydippid larvae of pleurobranchia

    (c)

    Redia larvae ofliver fluke

    (d)

    Trochophore larvae of Annelids

  10. In _____ types of natural parthenogenesis only females are produced.

    (a)

    Thelytoky

    (b)

    Arrhenotoky

    (c)

    Amphitoky

    (d)

    Arrhenotoky

  11. ______ is a process by which the proglottids are cut off from the tapeworm.

    (a)

    Apolysis

    (b)

    pedal laceration

    (c)

    budding

    (d)

    plasmotomy

  12. In _____ types of parthenogenesis egg can develop into individuals of any sex.

    (a)

    Thelytoky

    (b)

    paedogenesis

    (c)

    Amphitoky

    (d)

    Arrhenotoky


  13. Identify the correct option to label the diagram
    1 - Archaeocytes
    2 - Inner membrane
    3 - Micropyle
    4 - Outer membrane
    5 - Monaxonspicules

    (a)

    1-A 2-D 3-B 4-C 5-E

    (b)

    1-C 2-B 3-A 4-E 5-D

    (c)

    1-D 2-E 3-B 4-C 5-A

    (d)

    1-A 2-E 3-D 4-B 5-C


  14. Identify the correct option to label the diagram
    1 - Bud forming
    2 - Osculum
    3 - Bud growing
    4 - Daughter individual
    5 - Individual parent

    (a)

    1-A 2-D 3-B 4-C 5-E

    (b)

    1-B 2-D 3-C 4-E 5-A

    (c)

    1-D 2-E 3-B 4-C 5-A

    (d)

    1-A 2-E 3-D 4-B 5-C


  15. Identify the correct option to label the diagram Identify the structure
    1- Immature proglottids
    2 - Gravid proglottids
    3 - Scolex
    4 - Mature proglottids
    5 - Neck

    (a)

    1-C 2-E 3-A 4-D 5-B

    (b)

    1-B 2-D 3-C 4-E 5-A

    (c)

    1-D 2-E 3-B 4-C 5-A

    (d)

    1-A 2-E 3-D 4-B 5-C

  16. "Nothing lives forever, but life continues". What does it mean?

    (a)

    Older dies but new ones are produced by reproduction

    (b)

    Nothing can produce without death

    (c)

    Death has nothing to do with the continuation of life

    (d)

    Parthenogenesis is must for sexual reproduction

  17. A few statements describing certain features of reproduction are given below. Select the options that are true for both sexual and asexual reproduction from the options given:
    (i) Gametic fusion takes place
    (ii) Transfer of genetic material takes place
    (iii) Reduction division takes place
    (iv) Progeny have some resemblance, with parents

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    ii and iv

    (d)

    i and ii

  18. A few statements with regard to sexual reproduction are given below:
    i. Sexual reproduction does not always require two individuals
    ii. Sexual reproduction generally involves gametic fusion
    iii. Meiosis never occurs during sexual reproduction
    iv. External fertilization is a rule during sexual reproduction
    Choose the correct statements from the options below:

    (a)

    i and iv

    (b)

    i and ii

    (c)

    ii and iii

    (d)

    i and iv

  19. Given below, are a few statements related to external fertilization. Choose the correct statements:
    i. The male and female gametes are formed and released simultaneously
    ii. Only a few gametes are released into the medium
    iii. Water is the medium in a majority of organism exhibiting external fertilization
    iv. Offspring formed as a result of external fertilization have better chance of survival than those formed inside the organism

    (a)

    iii and iv

    (b)

    i and iii

    (c)

    ii and iv

    (d)

    i and iv

  20. Which of the following statements, support the view that elaborate sexual reproductive process develops much later in the organic evolution?
    i. Lower groups of organisms have simpler body design
    ii. Asexual reproduction is common- in lower groups
    iii. Asexual reproduction is common in higher groups of organisms
    iv. The high incidence of sexual reproduction is in angiosperms and vertebrates.

    (a)

    i, ii and iii

    (b)

    i, iii and iv

    (c)

    i, ii and iv

    (d)

    ii, iii and iv

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