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Sexual Reproduction in Flowering Plants Test - 86

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Sexual Reproduction in Flowering Plants Test - 86
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Synthetic seeds are produced by.
  • Question 2
    1 / -0
    Pollinia occur in.
    Solution
    The correct answer is A.
    A pollinium is a coherent mass of pollen grains in a plant that are the product of only one anther, but are transferred, during pollination, as a single unit. This is regularly seen in plants such as Orchidaceae commonly known as orchids and many species of milkweeds (Asclepiadoideae).
  • Question 3
    1 / -0
    Anemophily type of pollination is found in
    Solution
    Anemophily is wind pollination. Pollens are transported by winds. It occurs mainly in crops. Many economically important trees are also wind pollinated, e.g.pines, spruces, fiirns etc. In salvia, there is unusual pollination mechanism. When a pollinator, a bird or a bee, probes a male stage flower for nectar, the lever ( connection between two theca on the same stamen ) causes stamen to move and deposit pollen on the pollinator. In older, female stage flower the stigma is bent down in a general location where pollens are deposited.
  • Question 4
    1 / -0
    A plant with four heterogonous pairs of chromosomes having Aa, Bb, Cc, Dd is self fertilized, the resulting genotype with Aa Bb Cc Dd genes occur according to which one of the following frequencies?
  • Question 5
    1 / -0
    Which one of the following is typical of a monocot embryo? Plumule Radical Cotyledon?
    Solution
    Monocotyledonous embryos have a single cotyledon which is initiated very early.The position of plumule in monocot embryo is on the 'lateral side' of the primary axis.The position of radical is terminal.During development the differential growth in the cotyledon results in a lateral shoot apical meristem. Monocot contains one large shield-shaped cotyledons known as scutellum. Cotyledon is in apical position.
    Hence, the correct answer is (C)

  • Question 6
    1 / -0
    Yucca is pollinated by a.
    Solution
    The correct answer is D.
    The moth's larvae depend on the seeds of the yucca plant for food, and the yucca plant can only be pollinated by the yucca moth.
  • Question 7
    1 / -0
    Match List-I(Plant) with List-II(type of pollination according to the agency of pollination) and select the correct answer using the codes given the lists.
    List-IList-II
    a. Maize(Zea)$$1$$. Hydrophilous
    b. Snapdragon(Antirrhinum)$$2$$. Chiropterophilous
    c. Silk cotton(Salmalia)$$3$$. Entomophilous
    d. Vallisneria$$4$$. Anemophilous
    $$5$$. Ornithophilous
    Solution
    In Maize pollination is done by air so, anemophilous.
    In Snapdragon pollination is done by insects entomophilous
    In Silk cotton pollination is done by birds so, omithophilous
    In Vallisneria pollination is done by water so, hydrophilous.
    Hence, the correct answer is (B)
  • Question 8
    1 / -0
    The phenomenon of replacement of sexual reproduction with asexual reproduction is called
    Solution
    Apomixis is the process of formation of seeds without fertilization. As there is the lack of fertilization or involvement of gametes, it is called as asexual reproduction. Whereas vivipary is the development of the embryo inside the mother womb. karyogamy is the fusion of nucleus. Syngamy also called fertilization is the process of fusion of male and female gametes. Thus, the correct answer is option B.
  • Question 9
    1 / -0
    Stratification refers to a process in which seeds are subjected to a.
  • Question 10
    1 / -0
    Which one of the following pairs is correctly matched?
    Solution
    Correct Option: C
    Explanation:
    • In the fritillaria type, the one nuclei out of four nuclei that are formed remain toward the micropyle.
    • The three nuclei are at the chalazal end.
    • Chalazal nuclei fused together to form a 3n nucleus. 
    • Both the cells then undergo mitotic division.
    • again form a tetrasporic stage. 
    • These nuclei further undergoes mitotic division to form tetrasporic 8- nucleate type.
    • Hence, the correct answer is the Tetrasporic-8 nucleate-fritillaries embryo sac.

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