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Sexual Reproduction in Flowering Plants Test - 33

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Sexual Reproduction in Flowering Plants Test - 33
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Weekly Quiz Competition
  • Question 1
    1 / -0
    A dicot plant lacking cotyledons is
    Solution
    Cuscuta is a dicot plant but has no cotyledons because they are converted into a thread like hypocotyls, so they must find suitable hosts within a few days to survive. 
    So, the correct option is 'Cuscuta'.
  • Question 2
    1 / -0
    Seeds of maize is a 
    Solution
    Monocot seed are the type of seed that have one cotyledon called scutellum. For example, Maize.
    Dicot means seed posses two cotyledons. For example, Mango.
    Wind dispersed seed are those that use wind as a medium to move from one place to another. For example, Xanthium
    So, the correct answer is 'Monocot'.
  • Question 3
    1 / -0
    Male reproductive organ of a flower 
    Solution
    Stamen is the male reproductive organ. It consists of filament and anther. Pollination is a phenomenon that transfers of pollen grains from anther to stigma of carpel. 
  • Question 4
    1 / -0
    Adventitive polyembryony/from nucellar cells occur in.
    Solution
    Polyembryony is the occurrence of more than one embryo in a single seed. In adventive polyembryony, there is the formation of extra embryos due to sporophytic budding. One or more sporophytic cells, either nucellus or integuments undergo stages of embryogeny and eventually develop into mature embryos. This kind of polyembryony is found in citrus fruits.
    So, the correct answer is D.
  • Question 5
    1 / -0
    In Potato, self pollination is performed in
    Solution
    In potato, male and female flowers mature at the same time i.e it exhibits homogamy. Pollination in potato flowers takes place by curling of style. The style bends to bring the stigma in contact with the anthers and thus, pollens are deposited on the surface of the stigma. Thus, self pollination occurs.
    So, the correct answer is D.
  • Question 6
    1 / -0
    Seeds travel with water is filled with:
    Solution
    Seeds that travel in water is modified certain mechanism that makes them light and filled with air so that they are able to travel a long distance and reach to places that are far from the parents. 

    Its best example is the modification of mesocarp of coconut that helps it in hydrochory and able it to float a long distance.

    So, the correct option is B.
  • Question 7
    1 / -0
    In albuminous seeds, food is stored in ......... and in exalbuminous seeds, food is stored in ............
    Solution
    Albuminous seeds are the seeds which have food stored in the special nourishing tissue called as endosperm that remains persistent till maturity. Cotyledons only act as food sucking organs and not food storage organs. e.g. Castor seed.
    Exalbuminous seeds are the seeds which have the stored food and the cotyledons in a special structure called as the kernel. It does not remain until the embryo is mature. e.g. Pea seed.
    So, the correct answer is 'endosperm, cotyledons'.
  • Question 8
    1 / -0
    The phenomenon of pollen grains being transferred to stigma by air is called
    Solution
    The phenomenon of pollen grains being transferred to stigma by air is called anemophily. The pollen grains are light and non-sticky so that they can easily be carried by air currents. The flowers have well-exposed stamens so that the pollens are easily dispersed into wind currents. Flowers have a large feathery stigma to easily trap the airborne pollen grains. Anemophily is quite common in grasses, maize, wheat, sugarcane, bamboo, etc. Thus, the correct answer is option A.
  • Question 9
    1 / -0
    Anemophily occurs in
    Solution
    Anemophily is the type of pollination in which wind is the pollinating agent. The pollen grains are light and non-sticky so that they can easily be carried by air currents. The flowers have well-exposed stamens so that the pollens are easily dispersed into wind currents. Flowers have a large feathery stigma to easily trap the airborne pollen grains. It occurs in grasses, maize, wheat, etc.
  • Question 10
    1 / -0
    Pollination by insects is called
    Solution
    Pollination by insects is entomophily. Insects are the most common biotic agents of pollination. Bees are the most common insect which acts as pollinating agents. Other insect pollinators are butterflies, flies, beetles, wasps, ants, moths. Flowers are brightly colored and scented to attract the insects. Majority of insect-pollinated flowers are large-sized. Entomophily occurs in Calotropis, Ficus, Salvia, etc.
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