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Sexual Reproduction in Flowering Plants Test - 42

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Sexual Reproduction in Flowering Plants Test - 42
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Cotyledons and testa respectively are edible parts in
    Solution
    In groundnut, edible cotyledons remain below ground and act as a storage organ. The juicy red part of the pomegranate seed is called as sarcotesta, a modification of the outer epidermal cell layers in the seed coat (the testa).
    So, the correct answer is 'Groundnut and pomegranate'
  • Question 2
    1 / -0
    In many cultivated ornamental flowers, number of petal whorls is higher than the one in wild type. Extra petals are generally modified
    Solution
    The extra petals (petaloids) are stamens with extra tissue along their sides. Flowers may add tissue to only one side of the stamen (resemble stamen) or to both sides of the stamen (resemble true petal).
    So, the correct answer is 'stamens'
  • Question 3
    1 / -0
    Flowers and stamens of compositae are
    Solution
    Epigynous flower : Thalamus is hollowed out and fused with ovary. Other floral organs appear  at the top of ovary.
    Gynoecium is inferior while other parts are superior.
    So, the correct answer is 'epigynous and superior'
  • Question 4
    1 / -0
    The plant, whose seeds are known to have longest viability period is
    Solution
    Water lotus (Nelumbo  nucifera) have an unusually long period of viable germination. Even if, a seed is in the ideal condition of germination, it might remain dormant for decades. They show self-preservation and resistance to germination. 
    So, the correct answer is 'Nelumbo nucifera'
  • Question 5
    1 / -0
    In which of the following plants, cotyledons form the first pair of leaves?
    Solution
    If food is stored inside the endosperm then the cotyledons become small and thin. Such seeds are called as endospermic seeds or albuminous seeds. For example, maize, wheat and other cereals, castor bean seeds and coconut seeds.
    So, the correct answer is 'Castor'
  • Question 6
    1 / -0
    The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in 
    Solution
    The pomegranate fruit is a berry which develops from an inferior ovary. Each seed has a surrounding water-laden pulp known as the edible sarcotesta that forms from the seed coat. The seeds have no arils (exarillate). 
    Therefore, the correct answer is option C.
  • Question 7
    1 / -0
    In which of the following plant, the fruit is a drupe, seed coat is thin, embryo is inconspicuous and endosperm is edible?
    Solution
    The fruit of the coconut is a large, dry drupe composed of a thin outer layer (exocarp), a thick, fibrous middle layer called as a mesocarp and a hard inner layer called as an endocarp that surrounds a large seed. A small, cylindrical embryo is embedded in the endosperm nutritive tissue just opposite the functional germination pore. The seed is surrounded by an outer brown layer called as the seed coat or testa.
    Thus, the correct answer is option D.
  • Question 8
    1 / -0
    A fruit developed from hypanthodium inflorescence is called as
    Solution
    A syconium is a type of fruit in figs formed by an enlarged, fleshy, hollow receptacle with multiple ovaries on the inside surface. It is actually a fleshy stem with a number of flowers, so it is considered both a multiple and accessory fruit. 
    Therefore, the correct answer is option C.
  • Question 9
    1 / -0
    Mark the incorrect statement.
    Solution
    A true fruit or eucarp is a mature or ripened ovary, developed after fertilization, e.g., mango, maize, grape etc. 
    A false fruit or pseudocarp is derived from the floral parts other than ovary, e.g., peduncle in cashew-nut, thalamus in apple, pear, gourd and cucumber; fused perianth in mulberry and calyx in Dillenia. Jackfruit and pineapple are also false fruits as they develop from the entire inflorescence. False fruits are also called spurious or accessory fruits. 
    Parthenocarpic fruits are seedless fruits that are formed without fertilization, e.g., Banana. 
    Coconuts are classified as a fibrous one-seeded drupe.
    Thus, the correct answer is option D.
  • Question 10
    1 / -0
    Pineapple (Ananas) fruit develops from
    Solution
    The pineapple is not a real fruit. It is a cluster of individual berries fused to the central stalk. This is why it has the leaves on top. They are actually the continued growth of the stalk beyond where the berries are attached.
    Therefore, the correct answer is option A.
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