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Morphology of Flowering Plants Test 57

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Morphology of Flowering Plants Test 57
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  • Question 1
    1 / -0
    Pollinia are found in the flowers of 
    Solution
    Pollinia, which is called as pollinium in singular form, is a coherent mass of pollen grains in a plant that are the product of only one anther, but are transferred during pollination. It is being transferred as a single unit. This is regularly seen in plants such as orchids and many species of milkweeds. It is also seen in Calotropis.
    So, the correct answer is 'Calotropis'
  • Question 2
    1 / -0
    Such a kind of inflorescence is called as .............

    Solution
    The given flower belongs to spadix inflorescence. A spadix is a type of spike inflorescence having small flowers borne on a fleshy stem. The spadix is typically surrounded by a leaf-like curved bract known as a spathe. For example, the flower of the well known Anthurium spp.

  • Question 3
    1 / -0
    What type of leaf margin is found in grasses?
    Solution
    Entire leaf margins are found in grasses. A leaf that is smooth all the way around has an Entire margin. Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. The true grasses include cereals, bamboo and the grasses of lawns (turf) and grassland. Sedges include many wild marsh and grassland plants, and some cultivated ones such as water chestnut and papyrus sedge.
    Therefore, the correct answer is option C.

  • Question 4
    1 / -0
    In Iberis amara and Alyssum, the inflorescence is
    Solution
    In Iberis amara and Alyssum, the inflorescence is raceme. In raceme is an unbranched, indeterminate type of inflorescence bearing pedicellate flowers flowers having short floral stalks called as pedicels along its axis. Axis means a shoot, in this case one bearing the flowers. In indeterminate inforescences like racemes, the oldest flowers are borne towards the base and new flowers are produced as the shoot grows, with no predetermined
    growth limit.
    Therefore, the correct answer is option B.

  • Question 5
    1 / -0
    Flowering glumes are associated with ........ inflorescence
    Solution
    Flowering glumes are associated with locusta and spikelet inflorescence.Flowering glumes are the lower and stouter of the two glumes immediately enclosing the floret. They form small dry membranous bract found in inflorescences of Gramineae and Cyperaceae. A spikelet can refer to a small spike, although it is primarily used to refer to the ultimate flower cluster unit in grasses and sedges,  in
    which case the stalk supporting the cluster becomes the pedicel. A true
    spikelet comprises one or more florets enclosed by two glumes (sterile bracts), with flowers and glumes arranged in two opposite rows along the spikelet. Locusta grows in a low rosette with spatulate leaves. 
    Therefore, the correct answer is option D.

  • Question 6
    1 / -0
    A family which was named after its inflorescence is
    Solution
    A family which was named after its inflorescence is Apiaceae (umbelliferae). The defining characteristic of this family is the inflorescence: a simple or compound umbel. Flowers across the Apiaceae are fairly uniform and are usually perfect hermaphroditic and actinomorphic, but some are andromonoecious, polygamomonoecious, or even dioecious, with a distinct calyx and corolla, but the calyx if often highly reduced, to the point of being undetectable in many species, while the corolla can be white, yellow, pink or purple. The flowers are nearly perfectly entamerous, with 5 petals, sepals, and stamens. The androecium contains of 5 stamens, but there is often variation in the functionality of the stamens even within a single inflorescence. Some flowers are functionally staminate while others are functionally pistillate.
    Therefore, the correct answer is option C.

  • Question 7
    1 / -0
    Involucre forms the cup in the inflorescence of
    Solution
    Involucre forms the cup in the inflorescence of Poinsettia. In flowering plants, an involucral bract, or a pair, whorl or other collection of such bracts, surrounding an inflorescence, The colored bracts which are most often flaming red but can be orange, pale green, cream, pink, white, or marbledare often mistaken for flower petals because of their groupings and colors, but are actually leaves.
  • Question 8
    1 / -0
    Unisexual flowers are found in inflorescence of
    Solution
    Unisexual flowers are present in Morus, Ficus and Poinsettia. A unisexual flower is one that has stamens but no pistils or having pistils but no stamens. A flower having only stamens is said to be staminate, or male. A flower having only pistils is said to be pistillate, or female. In many unisexual flowers, the nonfunctioning organs of the other sex are present in reduced form, thus attesting to the plants original bisexual nature. Such flowers are said to be functionally male or functionally female.
    Therefore, the correct answer is option D.

  • Question 9
    1 / -0
    A giant spadix is formed in a species of
    Solution
    Amorphophallus tubers vary from species to species. These species develop an inflorescence consisting of an elongate or ovate spathe which usually envelops the spadix (a flower spike with a fleshy axis). The spathe can have different colors, but mostly brownish-purple or whitish-green. 
    On the inside, they contain ridges or warts, functioning as insect traps.
    Therefore, the correct answer is option C.

  • Question 10
    1 / -0
    The inflorescences with indeterminate growth of axis are found in
    Solution

    The inflorescences with indeterminate growth of axis are found in Raceme and cyathium. Indeterminate simple inflorescences are generally called as racemose. The main kind of racemose inflorescence is the raceme  and the other kind of racemose inflorescences can all be derived from this one by dilation, compression, swelling or reduction of the different axes. The cyathia are sometimes solitary, but are usually in cymes, inflorescences of the second order, in pseudumbels, on dichotomously branched stalks or in so-called simple cymes which consist of one central and two lateral cyathia.
    Therefore, the correct answer is option A.

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