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Sexual Reproduction in Flowering Plants Test - 45

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Sexual Reproduction in Flowering Plants Test - 45
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  • Question 1
    1 / -0
    Future shoot hidden in a seed is called as 
    Solution
    The young shoot of a plant embryo above the cotyledons, consisting of the epicotyl and often immature leaves is the plumule. It is the future shoot. Part of a seed embryo that develops into the shoot, bearing the first true leaves of a plant. In most seeds, for example, the sunflower, the plumule is a small conical structure without any leaf structure. The growth of the plumule does not occur until the cotyledons have grown above ground.

  • Question 2
    1 / -0
    Which of the following is the correct sequence of events of sexual reproduction in a flower?
    Solution
    Sequence of events of sexual reproduction in flowers are:
    (1) Pollination- transfer of pollen to stigma.
    (2) Fertilization- fusion of male gamete and egg cell produce zygote and fusion of polar nuclei with male gamete produce triploid endosperm.
    (3) Embryo formation- zygote divides many time by mitosis and produces embryo.
    (4) Seedling- embryo differentiate and becomes plumule, radicle and one or two cotyledons. Endosperm divides by mitosis to produce endosperm tissue which is food store. Integuments surrounding embryo sac forms testa (seed coat).
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    The anther contains
    Solution

    A) Correct Option– D
    B) Explanation For Correct Option -

    • The stamen are male reproductive organs.
    • They contain anther which is the site of pollen development.
    • Inside anther male sporogenous cell differentiates and undergoes meiosis to produce microspores that develop into pollen grains.

  • Question 4
    1 / -0
    In Figure, the parts A, B and C are ___, ___ and _____.

    Solution
    Seed comprises of an embryo and reserved food enclosed in a protective seed coat. The reserved food may be present in cotyledons or endosperm. The embryonic axis comprises of a plumule and radicle, present on opposite sides of the point of attachment of cotyledons to the embryonic axis.
  • Question 5
    1 / -0
    An example of a seed with endosperm, perisperm and car uncle is -

  • Question 6
    1 / -0
    Which of the following is the correct sequence of the events of sexual reproduction in a flower?
    Solution
    The sequence of sexual reproduction in a flower is as follows:
    a) Pollination is the process of transfer of pollen grains from the anther to the stigma of the flower.
    b) Fertilisation is the fusion of male and female gametes which leads to the formation of the embryo.
    c) The embryo is the developmental stage of a zygote which further develops into a seed.
    d) The embryo develops a tough coating around it and forms seed.
    So, the correct answer is option A.
  • Question 7
    1 / -0
    The migration of pollen grains to stigma is called as____________.
    Solution
    Pollination is the process by which pollen is transferred from the anther or the male part to the stigma or the female part of the plant thereby enabling fertilization and reproduction. Fertilization is the fusion of male and female gametes. Reproduction is the biological process by which an individual organism is produced from their parents.
    Thus, the correct answer is option (B), 'Pollination'.
  • Question 8
    1 / -0
    Pollen grains are produced by
    Solution
    Correct option: B
    Explanation:
    • Stamens are the male reproductive structure of the plant.
    • They produce pollen grain by the process of microsporogenesis.
    • Leaves are the vegetative part of plants.
    • The gynoecium is the female reproductive part of the plant that produces the ovum.
    • The pistil is synonymous with gynoecium.
    Hence, pollen grains are produced by "stamens".
  • Question 9
    1 / -0
    If sepals and petals of a flower are arranged in a whorl, the flower is
    Solution
    If sepals and petals of a flower are arranged in a whorl the flower is cyclic. It mainly consists of a single whorl of sepals termed a calyx, a single whorl of petals termed as corolla; one or more whorl of stamens - together termed the androecium, and a single whorl of carpels termed the gynoecium. This is a cyclic arrangement. Therefore, the correct answer is option A.

  • Question 10
    1 / -0
    Cruciferae belongs to
    Solution
    Parietales is the botanical name of the order of a flowering plant. Cruciferae belongs to this order.
    Bicarpellatae is the artificial group used in the classification of plants. 
    Gamopetalae is the condition present in angiosperms where the petals are united. But, in Cruciferae petals are free. 
    Calyciflorae is the grouping of plants that is no longer used by botanists. 
    So, the correct answer is option A.
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