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Reproduction in Plants Test - 9

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Reproduction in Plants Test - 9
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  • Question 1
    1 / -0
    Grafting is not possible in monocotyledons because they
    Solution
    Grafting is not possible in monocotyledons because they lack cambium as it helps in binding the two parts of the stem.
  • Question 2
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    Which of the following is a correct way of sowing leaf and stem cuttings of a plant?
    Solution
    The correct way of sowing leaf and stem cuttings of a plant is vertically with morphological apical end upwards.
  • Question 3
    1 / -0
    Which of the following plants has lost its ability to produce seeds?
    Solution
    Banana has lost its ability to produce seeds.At present, modern edible bananas have undergone certain processes of special selection and have lost their ability to produce seeds.
  • Question 4
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    What do you call the union of two gametes of same sex?
    Solution
    The union of two gametes of same sex is called parthenogamy.
  • Question 5
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    Which of the following types of reproduction does not involve gametic union?
    Solution
    Apomixis does not involve gametic union. Apomixis in flowering plants is defined as the asexual formation of a seed from the maternal tissues of the ovule, avoiding the processes of meiosis and fertilization, leading to embryo development.
  • Question 6
    1 / -0
    Roots of which of the following plants are involved in asexual reproduction?
    Solution
    Sweet potato and dahlia are the plants which propagate vegetatively by roots of the plants. Vegetative propagation is a method of asexual reproduction.
  • Question 7
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    For self–pollination, a flower should be
    Solution
    For self–pollination, a flower should be bisexual.For example:-Sunflower, hibiscus, mustard, rose, lily.
  • Question 8
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    Pollination by water is called
    Solution
    Pollination by water is called hydrophily.It can occur in one of two ways. Either the pollen grains themselves are carried on or under the surface of the water, or the male flowers break off and float along until they come into contact with a female flower.
  • Question 9
    1 / -0
    What do you mean by entomophily?
    Solution
    Pollination through insects is called entomophily. Several insects are reported to be responsible for the pollination (potential or effective) of many plant species, particularly bees, Lepidoptera (butterflies and moths), wasps, flies, ants and beetles.
  • Question 10
    1 / -0
    The pollination performed by bats is called
    Solution
    The pollination performed by bats is called chiropterophily.Bat pollination is most common in tropical and desert areas that have many night-blooming plants.
  • Question 11
    1 / -0
    Self-pollination is transfer of pollen from anther to stigma of
    Solution
    Self-pollination is transfer of pollen from anther to stigma of the same flower of the same plant.There are two types of self-pollination:In autogamy, pollen is transferred from the anther to the stigma of the same flower.In geitonogamy, pollen is transferred from the anther of one flower to the stigma of another flower on the same flowering plant or within a single monoecious Gymnosperm.
  • Question 12
    1 / -0
    By which of the following organisms is entomophily performed?
    Solution
    Entomophily is performed by insects.Entomophilous species include the sunflower, orchids and cycads.
  • Question 13
    1 / -0
    Which of the following parts of a stem branch is used in layering?
    Solution
    Soft basal branch of a stem branch is used in layering.Layering is a means of plant propagation in which a portion of an aerial stem grows roots while still attached to the parent plant and then detaches as an independent plant.
  • Question 14
    1 / -0
    What do you call the part of a plant which is grafted on the stump of another plant?
    Solution
    The part of a plant which is grafted on the stump of another plant is called scion.It is a basically a detached shoot or twig containing buds from a woody plant which is grafted onto the stock.
  • Question 15
    1 / -0
    Double fertilisation means the fusion of
    Solution
    Double fertilisation means the fusion of one male gamete with the egg and other with the antipodal cell. It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower. The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the ovary through the style. The tip of the pollen tube then enters the ovary and penetrates through the micropyle opening in the ovule. The pollen tube proceeds to release the two sperm in the megagametophyte.
  • Question 16
    1 / -0
    In high plants, usually the haploid (half) set of chromosomes are present in
    Solution
    In high plants, usually the haploid (half) set of chromosomes are present in pollen.
  • Question 17
    1 / -0
    Which of the following plants shows cross pollination?
    Solution
    Mercurialis shows cross pollination.Cross-pollination, also called allogamy, occurs only when pollen is delivered to a flower from a different plant. Plants adapted to outcross or cross-pollinate often have taller stamens than carpels or use other mechanisms to better ensure the spread of pollen to other plants' flowers.
  • Question 18
    1 / -0
    What do you mean by autogamy?
    Solution
    Pollination between the anther and stigma of same flowers of same species is called autogamy.
  • Question 19
    1 / -0
    What do you call the pollination occurring in closed flowers?
    Solution
    The pollination occurring in closed flowers is called cleistogamy. Especially well known in peanuts, peas, and beans, this behavior is most widespread in the grass family. However, the largest genus of cleistogamous plants is actually Viola.
  • Question 20
    1 / -0
    The seeds in a mature ovary are developed from
    Solution
    The seeds in a mature ovary are developed from endosperm.
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