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 : (26-30)
    Read the passage given below and answer the following questions.
    Flower has two parts of a typical stamen such as the long and slender stalk called the sterile filament, and the terminal generally bilobed structure called the fertile anther. The proximal end of the filament is attached to the thalamus or the petal or tepal of the flower. Two anther lobes are separated in the anterior region by a deep groove however, attached to each other on the back side by sterile parenchymatous tissue i.e., connective tissue has vascular strand i.e., xylem and phloem. The number and length of stamens are variable in flowers of different species i.e., heterostamens. A typical angiosperm anther is bilobed with each lobe having two thecae. Often a longitudinal groove runs lengthwise separating the theca.
    Nature of the filament of stamen is-

    A) It is fertile in nature.

    B) It is sterile in nature.

    C) Young is sterile but on maturity become fertile in nature.

    D) Young is fertile but on maturity become sterile in nature.

    Correct Answer: B

    Solution :

    It is sterile in nature.


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