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Sexual Reproduction in Flowering Plants Test - 41

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Sexual Reproduction in Flowering Plants Test - 41
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  • Question 1
    1 / -0
    Choose the product that is derived from style and stigma.
    Solution
    Saffron thread is the stigma of saffron flower. Three stigmas together with style, after drying constitute the commercial saffron. It is the most expensive spice found in the world. It is widely known for its aromatic flavor and colour. 
    Thus, the correct answer is option A.
  • Question 2
    1 / -0
    Axis developing between androecium and gynoecium is
    Solution
    The development of internode between the androecium and the gynoecium and raise the gynoecium above the general level of the flower is called as gynophore. It is the stalk of flowers which supports the gynoecium elevating it above the branching points of other floral parts. For example, Michelia, Capparis, Gynandropsis in which there is a green rod-like structure found between androecium and gynoecium. 
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    Monadelphous androecium occurs in
    Solution
    In monoadelphous androecium, all the filaments are united into a single bundle but anthers are free from each other. In this type of cohesion a tube is formed around the gynoecium which is called as staminal tube. For example, Cotton, Hollyhock, Ladyfinger and Hibiscus.
    So, the correct answer is 'Hibiscus'
  • Question 4
    1 / -0
    Emasculation is a part of
    Solution
    Removal of stamens from a bisexual flower before anthesis (anthesis is the period during which a flower is fully open and functional) is called as emasculation. Emasculation is useful for preventing the self pollination in female parent which is concerned with hybridization.
    So, the correct answer is 'hybridization'
  • Question 5
    1 / -0
    Stamens attached to petals are
    Solution
    • The attachment of stamens to petals, tepals, or gynoecium is called adhesion. When the stamens are attached to petals, it is called epipetalous, e.g., sunflower.
    • Antipetalous having stamens opposite the petals, e.g., coriandrum.
    • When stamens are seen as arising from the perianth lobe (tepals), they are called epiphyllous, e.g., Asparagus.
    • When stamens are attached to the sepals are called episepalous, e.g, some species of Verbena.
    Thus, the correct answer is option B.
  • Question 6
    1 / -0
    When stamens are superior, the flower is
    Solution
    In an epigynous condition, the margin of thalamus grows upward enclosing the ovary completely and gets fused with it. The other parts of flower arise above the ovary. The ovary is inferior and this condition is known as epigynous, e.g., guava, cucumber and ray florets of sunflower.
    Thus, the correct answer is option C.
  • Question 7
    1 / -0
    In some plants the style is shorter. But in some others, it is longer than the stamens. This condition is called as
    Solution
    Heterostyly is the floral form with reciprocal differences in the length of the style and stamens to prevent self-fertilization.
    Thus, the correct answer is option C.
  • Question 8
    1 / -0
    In which of the following, the seed germinates and still attached with the main plant?
    Solution
    Viviparous plants produce seeds that germinate before they detach from the parent plant. In Rhizophora (mangroves), the seed germinates and develops into the seedling when it still attached to the parent plant
    So, the correct answer is 'Rhizophora'
  • Question 9
    1 / -0
    In non-endospermic seeds, food is stored in
    Solution
    In the non-endospermic or exalbuminous seeds, the endosperm is completely consumed by the developing embryo and the mature seeds are without endosperm. The food is stored in cotyledons. For example, gram, pea, bean etc.
  • Question 10
    1 / -0
    The primitive type of stamens are found in which of the following family?
    Solution
    The Magnolia family has the following primitive characteristics:
    (1) Large flowers with numerous petals and sepals (tepals).
    (2) Numerous spirally arranged stamens at the base of a cone like receptacle bearing numerous spirally arranged carpels.
    (3) Each seed has a fleshy red outer layer (aril) and hangs from its follicle by a threadlike stalk.
    (4) Radial symmetry or actinomorphic and floral axis (receptacle) elongated.
    Thus, the correct answer is option D.
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