Up Board Class 12th-biology-unit-II-sexual-reproduction In Flowering Plants Online Assessment

23 Questions

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Up Board Class 12th-biology-unit-II-sexual-reproduction In Flowering Plants Online Assessment

MM: 25marks Time:30 mins


Questions and Answers
  • 1. 
    Sepals and petals orperianth are inconspicuous in entomophilous flowers.
    • A. 

      True

    • B. 

      False

  • 2. 
    Which of the following floral parts forms the pericarp after fertilisation?
    • A. 

      Nucellus

    • B. 

      Outer integument

    • C. 

      Ovary Wall

    • D. 

      Inner Integument

  • 3. 
    The number of meiotic divisions, required to produce 400 seeds in a pea plant, is
    • A. 

      100

    • B. 

      200

    • C. 

      400

    • D. 

      500

  • 4. 
    When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is known as
    • A. 

      Autogamy

    • B. 

      Geitonogamy

    • C. 

      Xenogamy

    • D. 

      Cliestogamy

  • 5. 
    A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is
    • A. 

      Plant is dioecious and bears only pistillate flowers.

    • B. 

      Plant is dioecious and bears both pistillate and staminate flowers.

    • C. 

      Plant is monoecious.

    • D. 

      Plant is dioecious and bears only staminate flowers.

  • 6. 
    The following statements describe the wind-pollinated plants. Which one of these statements is incorrect?
    • A. 

      The pollen grains are sticky.

    • B. 

      Stamens are well-exposed.

    • C. 

      Flowers often have single ovule.

  • 7. 
    The following statements (i), (ii) and (iii) . seem to describe the water-pollinated submerged plants. Which one of these statements is incorrect?
    • A. 

      The flowers do not produce nectar.

    • B. 

      The pollen grains have mucilaginous covering.

    • C. 

      The brightly-coloured female flowers have long stalks to reach the surface.

  • 8. 
    Functional megaspore in an angiosperm develops into:
    • A. 

      Endosperm

    • B. 

      Embryo

    • C. 

      Embryo-Sac

    • D. 

      Ovule

  • 9. 
    The process of formation of seeds without fertilization in flowering plants is known as
    • A. 

      Budding

    • B. 

      Apomixis

    • C. 

      Sporulation

    • D. 

      Somatic hybridization

  • 10. 
    Which of the following fruit is produced by parthenocarpy?
    • A. 

      Brinjal

    • B. 

      Apple

    • C. 

      Banana

    • D. 

      Jack Fruit

  • 11. 
    What is the function of the filiform apparatus?
    • A. 

      Guide the entry of pollen tube

    • B. 

      Recognize the suitable pollen at the stigma

    • C. 

      Produce nectar

    • D. 

      Stimulate division of generative cell

  • 12. 
    The two nuclei at the end of the pollen tube are called:
    • A. 

      Tube nucleus and a generative nucleus

    • B. 

      Sperm and ovum

    • C. 

      Generative nucleus and stigma

    • D. 

      Tube nucleus and sperm

  • 13. 
    Generative nucleus divides forming
    • A. 

      2 male nuclei

    • B. 

      2 female nuclei

    • C. 

      3 male nuclei

    • D. 

      3 female nuclei

  • 14. 
    The other name for gynoecium is
    • A. 

      Pistil

    • B. 

      Androecium

    • C. 

      Stigma

    • D. 

      Style

  • 15. 
    During microsporogenesis, meiosis occurs in:
    • A. 

      Endothecium

    • B. 

      Microspore mother cells

    • C. 

      Microspore tetrads

    • D. 

      Pollen grains.

  • 16. 
    Conidia are formed endogenously while zoospores are formed endogenously.
    • A. 

      True

    • B. 

      False

  • 17. 
    Embryo sac → Nucellus → Integuments, is the correct sequence of parts in the ovule of an angiosperms. 
    • A. 

      True

    • B. 

      False

  • 18. 
    Sepals and petals orperianth are inconspicuous in entomophilous flowers.
    • A. 

      True

    • B. 

      False

  • 19. 
    Meiosis does not occur in the organisms showing haplontic life cycle. 
    • A. 

      True

    • B. 

      False

  • 20. 
    Which of the following statements is correct?
    • A. 

      Sporogenous tissue is haploid

    • B. 

      The hard outer layer of pollen is called intine

    • C. 

      Tapetum nourishes the developing pollen

    • D. 

      Microspores are produced by endothecium

  • 21. 
    The stalk of the ovule is called _____ .
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