12th Class Biology Sexual Reproduction in Flowering Plant / फूलों के पौधों में यौन प्रजनन Question Bank Case Based - Sexual Reproduction in Flowering Plants

  • question_answer
    Directions : (16 - 20)
    Read the passage given below and answer the following questions.
    The typical ovule is a small structure attached to the parenchymatous cushion placenta by means of a stalk called funicle. The body of the ovule fuses with funicle in the region called hilum. Funicle has vascular strand for the supply of nourishment to the ovule. Thus, hilum represents the junction between ovule and funicle. Each ovule has one or two protective envelopes called integuments. Integuments encircle the ovule except at the tip where a small opening called the micropyle is organised. Opposite the micropylar end, is the chalaza, representing the basal part of the ovule. Enclosed within the integuments is a mass of parenchymatou cells called the nucellus. Cells of the nucellus have abundant reserve food materials. Inside the nucellus is the development of embryo sac or female gametophyte. An ovule generally has a single embryo sac formed from a megaspore.
    Placenta of ovule is composed of which type of cell.

    A) Collenchymatous

    B) Sclerenchymatous

    C) Parenchymatous

    D) Cuboidal or columnar

    Correct Answer: C

    Solution :

    Parenchymatous


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