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Morphology of Flowering Plants Test 71

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Morphology of Flowering Plants Test 71
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  • Question 1
    1 / -0
    The type of inflorescence in compositae family is?
    Solution
    A. Capitulum or head in which main axis becomes flat and called receptacle. It bears many sessile and small florets. Peripheral florets called ray florets are pistillate or neuter and zygomorphic, whereas disc florets are bisexual and actinomorphic. It is type of racemose inflorescence. A capitulum or head, the characteristic inflorescence of the sunflower family (Asteraceae).
    B. Verticillaster is a cluster of sessile or subsessile flowers borne on a dichasial cyme ending in a monochasial cyme (scorpioid) in the form of condensed whorl on either side of the node. It is a type of cymose inflorescence. Examples are tulsi and salvia (Lamiaceae).
    C. Cyathium looks like a single flower. A cup shaped involucre formed by bracts encloses a single female flower and a number of male flowers. Each male flower is represented by a single stamen, while a single pistil represents a female flower. It is a type of cymose inflorescence. The example is Poinsettia.
    D. Hypanthodium is fleshy receptacle forming a hollow cavity with an apical opening called ostiole. The flowers are developed on the inner wall of the hollow cavity. The male flowers are situated at the top near the opening, at the bottom are situated the female flowers with long styles and in between both are situated short-styled gall flowers which are sterile. It is a type of cymose inflorescence. The example is banyan.

    So, the correct answer is 'Capitulum'.
  • Question 2
    1 / -0
    Pulvinate leaf base is found in
    Solution
    Pulvinus is a swollen leaf base. Pulvinate leaf base is found in leguminous plants. It is seen in mango leaves. It is seen in Fabaceae family. Example includes Trifolium pratense.
    Thus, the correct answer is 'Trifolium.'
  • Question 3
    1 / -0
    Family fabaceae is included under series
    Solution
    Fabaceae comes under order Rosales of series under Calyciflorae as in has flowers in which sepals are united and stamens and petals appear to emerge from the base of calyx.
    So the correct option is 'Calyciflorae'.
  • Question 4
    1 / -0
    A monocot showing reticulate venation is
    Solution

    The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, Hibiscus, papaya, Ficus, Bambusa. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, plum, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. However, there are exceptions in monocots like Smilax and Colocasia. They show reticulate venation. Thus, the correct answer is 'Smilax.'

  • Question 5
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    Bombax leaf is

    Solution
    Compound leaves are of two types, namely pinnately compound leaves and palmately compound leaves. In palmately compound leaf, the leaflets are arranged at the tip of the petiole. It is further divided into 5 types depending upon the number of leaflets present at the tip of the petiole. In unifoliate, there is only one terminal leaflet is attached at the top of petiole. Example includes Citrus. In bifoliate, two leaflets are attached side by side at the terminal end of petiole. Example includes Balanites roxburghii. In trifoliate, three terminal leaflets are attached at the terminal end of petiole. Example includes Aegle marmelos. In quadrifoliate, four leaflets are attached to the tip of petiole. Example includes Paris quadrifolia. In multifoliate, five or more leaflets are present at the tip of petiole in the form of fingers of the palm. Example includes Bombax malabarica.
    Thus, the correct answer is 'Multifoliate.'
  • Question 6
    1 / -0
    Ochreate stipules occur in leafy vegetable
    Solution

    There are different types of stipules present in plants such as lateral, ventral, scaly, intrapetiolar, interpetiolar, ochreate, spinous, tendrillar. In ochreate, the stipules are in the form of a tubular sheath around the internode. These are seen in leafy vegetables like Rumex and Polygonum. Foliaceous stipules occur in Lathyrus aphaca. Tendrillar stipules occur in Smilax. Thus, the correct answer is 'Rumex.

  • Question 7
    1 / -0
    Which one of the following has compound umbel?
    Solution
    Umbel has the main axis reduced very much and all flowers appear to be arising from the same point. At the base of flowers, a cluster of bracts forming an involucre. It is a type of racemose inflorescence. An example is Hydrocotyle. Compound umbel is found in coriander and scapigerous umbel is found in onion. 

    So, the correct answer is 'Coriandrum'.
  • Question 8
    1 / -0
    A dicot leaf having parallel venation is
    Solution
    The phenomenon of arrangement of veins on the leaf is called as venation. There are two types venation, namely reticulate venation and parallel venation. Reticulate venation involves irregular distribution of veins to form a network. Examples of plants showing reticulate venation include rose, tulsi, Hibiscus, papaya, Ficus, Bambusa. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, plum, Zea (maize). Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. However, there are exceptions in dicots  like Corymbium, Calophyllum, Eryngium. They show parallel venation. 
    Thus, the correct answer is 'Eryngium.'
  • Question 9
    1 / -0
    Which one of the following possesses winged petiole?
    Solution

    Winged petiole is the petiole in which there is a thin flange of tissue along the length of the petiole. It is a green flattened petiole. Plants like Citrus and Dionaea possess winged petiole. Thus, the correct answer is 'Citrus.'

  • Question 10
    1 / -0
    Spadix or inflorescence with spathe occurs in?
    Solution
    A. Catkin is a pendulous spike in leaf axis which bears unisexual flowers. It is a type of racemose inflorescence. The example is mulberry.
    B. The spadix is a spike with a fleshy axis and having both male and female flowers. It is surrounded by large colored bracts called spathe. It is a type of racemose inflorescence. The example is banana.
    C. Compound umbel is found in coriander.
    D. Racemose in which the shoot axis continue to grow indefinitely and the flowers are borne in acropetal order. Example is Delonix.

    So, the correct answer is 'Banana'. 
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