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Sexual Reproduction in Flowering Plants Test - 82

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Sexual Reproduction in Flowering Plants Test - 82
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  • Question 1
    1 / -0
    Wind pollinated plants generally do not show the character.
    Solution
    Anemophilous flowers are wind pollinated and they lack showy large colourful petals as they do not have to attract insects. Rather they have light weighted flowers so that they can float to distance in air.
    So, the correct option is D.
  • Question 2
    1 / -0
    Which has explosive fruits?
    Solution
    Entada gigas explode in the forests with a sound of crackers. It is known as monkey ladder. It has a hollow cavity, which gives them buoyancy and leads to bursting of seeds. It is carried to long distances by the current of water.
    So, the correct answer is option D.
  • Question 3
    1 / -0
    The process of removing stamens from floral buds during hybridisation experiments is
    Solution

    A.Capping – Addition of methylated guanosine triphosphate at the 5’end of hnRNA.

    B.Selfing – Transfer of pollen grains on the stigma of the same flower is called self pollination.

    C.Emasculation – Removal of anthers from the female flowers of female parent is called Emasculation. It is meant for avoidance of unknown cross pollination.

    D.Crossing – Transfer of pollen grains from anthers to the stigma of another flower of same species

    So, the correct option is ‘ Emasculation’.
  • Question 4
    1 / -0
    Emasculation is related to
    Solution
    Emasculation is the process of removal of anthers, the male part in the plants.  This process is carried out from bisexual or male flowers. It is related to hybridization. During hybridization, fertilization has to be done by pollen from a desired parent plant. This is done in order to prevent self fertilization. 
    Thus, the correct answer is 'Hybridization.'
  • Question 5
    1 / -0
    Mulberry is pollinated by
    Solution
    Mulberry may be monoecious or dioecious plant. The flowers are borne in short pendent catkins. Catkins are the clusters of flowers that are free to move and are characteristic of wind pollinated flowers. Thus, the anthers are borne in male catkins so that they can shed their pollen as they move due to wind. The female flowers are also pendulous so that pollen can be catched easily. Thus, pollination occurs by means of wind in Mulberry.
    So, the correct answer is A.
  • Question 6
    1 / -0
    Emasculation ensures cross pollination in _______________.
    Solution

    Removal of stamens in a bisexual flower during hybridization is called Emasculation. It is used to avoid unknown self pollination in bisexual flower.

    So, the correct option is ‘Bisexual flower’.
  • Question 7
    1 / -0
    The orthodox seed is found in 
    Solution
    Orthodox seeds are those that can be stored for a long period because these can tolerate the reduction in moisture content (up to 50%)  when exposed to anaerobic conditions and low temperature, e.g., legumes and cereals. Seeds of coconut, tea, jack, etc. are recalcitrant seeds, which get killed when there is the reduction of moisture or exposure to low temperature.
    So, the correct answer is option B.
  • Question 8
    1 / -0
    Diplospory leads to
    Solution
    Diplospory is a kind of gametophytic Apomixis in which nucellar cells of the ovule divide mitotically and form an unreduced embryo sac. Adventive embryony is formation of embryo due to sporophytic budding. One or more diploid sporophytic cells, either nucellus or integuments undergo stages of embryogeny and eventually develop into mature embryos.
    Hence, diplospory leads to adventive embryony.
    So, the correct answer is A.
  • Question 9
    1 / -0
    Butterflies pollinate
    Solution
    Butterflies are attracted to the flowers that are scented, showy and bright in color. Butterflies can see the colors in ultra violet range and their most preferred color of flowers for pollination is blue. Hence, butterflies pollinate bluish flowers.
    So, the correct answer is A.
  • Question 10
    1 / -0
    Embryo without plumule, radicle and cotyledon is formed in
    Solution
    The members of family Orchidaceae have an undifferentiated embryo in which plumule, radicle and cotyledon is absent. The embryos of orchids are very minute in size. In such plants, the seeds are formed without undergoing embryogenic differentiation. The globular structure divides and after attaining some size differentiates to form roots and shoots. Hence, embryo without plumule, radicle and cotyledon is found in Orchids.
    So, the correct answer is A.
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