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Morphology of Flowering Plants Test 27

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Morphology of Flowering Plants Test 27
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  • Question 1
    1 / -0
    Multicostate parallel venation occurs in
    Solution
    Venation is the arrangement of veins on the leaves. It is basically of 2 types, reticulate and parallel. Reticulate venation involves irregular distribution of veins to form a network. Parallel venation involves the veins running parallel to each other. In pinnate or unicostate venation, the lamina has a single principal vein or midrib. It produces lateral veins. In palmate or multicostate venation, lamina has more than one principal vein. In Grasses and Palms, the venation is multicostate parallel. 
    Thus, the correct answer is 'Grasses and Palms.'
  • Question 2
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    Pulvinus is found in
    Solution
    A swollen leaf base is called as Pulvinus. This type of leaves are seen in legume plants. The swelling results due to change in the turgor pressure. Night closure movement of legume leaves shows this pulvinar movement. The pulvinus protects the young axillary bud.
    Thus, the correct answer is 'Legume plants.'
  • Question 3
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    Name the plant having reticulate venation.
    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, Mangifera. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa, Oryza. Leaves of monocot plants show parallel venation and leaves of dicot plants show reticulated venation. Thus, the correct answer is 'Mangifera.'

  • Question 4
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    Venation is generally reticulate in ________.
    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. Parallel venation involves the veins running parallel to each other. Examples of plants showing parallel venation include grains, banana, canna, grass, musa. Leaves of monocot plants generally show parallel venation and leaves of dicot plants generally show reticulate venation.
    Thus, the correct answer is 'Dicot plants.'
  • Question 5
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    Arrangement of flowers on the floral axis of plant is called?
    Solution
    An inflorescence is the arrangement of flowers on the floral axis of the plant. Two major types of inflorescence are - 1. Racemose - the shoot axis continues to grow indefinitely and the flowers are borne in acropetal succession. 
    2. Cymose - the main axis terminates into a flower and has limited growth and the flowers are borne in a basipetal order. Examples are begonia, teak, and Solanum.
    So, the correct answer is option A. 
  • Question 6
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    The whorl of bracts present below the inflorescence of sunflower is
    Solution
    Capitulum or head bears many sessile and small florets. Main axis becomes flat and called receptacle. At the base of flowers, cluster of bracts form an involucre. It is type of racemose inflorescence. Example is sunflower.
    So, the correct answer is 'Involucre'.
  • Question 7
    1 / -0
    Pedicellate flowers arising from a single point form.
    Solution
    A. Umbel in which the main axis is reduced very much and all flowers appear to be arising from the same point. At the base of flowers, cluster of bracts form an involucre. It is type of racemose inflorescence. Example is hydrocotyle.
    B. Cymose in which the main axis terminates into a flower and hence has a limited growth. In cymose inflorescence the flowers are borne in a basipetal order. Examples are begonia, oak and Solanum.
    C. Capitulum or head bears many sessile and small florets. The main axis becomes flat and called receptacle. It is type of racemose inflorescence. Example is sunflower.
    D. Verticillaster is a cluster of sessile or subsessile flowers borne on a dichasial ending in monochasial cyme in the form of condensed whorl on either side of the node. Example is tulsi.
    So, the correct answer is 'Umbel'.
  • Question 8
    1 / -0
    A monocot leaf having 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, Alocasia, Dioscorea, Colocasia. They show reticulate venation. 
    Thus, the correct answer is 'All of the above.'
  • Question 9
    1 / -0
    In Candytuft, the inflorescence is?
    Solution
    A. Typical raceme is peduncle having bisexual and pedicellate flowers arranged acropetally. It is type of racemose inflorescence. Examples are larkspur and radish.
    B. Corymb is lower flowers have long pedicels than upper ones so that all the flowers are brought more or less to the same level. The main axis is short. It is type of racemose inflorescence. Examples are Iberis Sempervirens (candytuft) and capsella.
    C. Corymbose raceme is found in mustard.
    D. Umbel in which the main axis is reduced very much and all flowers appear to be arising from the same point. At the base of flowers, cluster of bracts form an involucre. It is type of racemose inflorescence. Example is hydrocotyle.
    So, the correct answer is 'corymb'.
  • Question 10
    1 / -0
    Pedicellate bisexual flowers borne acropetally on an elongated peduncle form an inflorescence called.
    Solution
    A. Spike is peduncle having bisexual and sessile flowers. It is a type of racemose inflorescence. Examples are Achyranthes and Adhathoda.
    B. A corymb is lower flowers have long pedicels than upper ones so that all the flowers are brought more or less to the same level. The main axis is short. It is a type of racemose inflorescence. Examples are Iberis and Capsella.
    C. Raceme is peduncle having bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. Examples are Larkspur and radish.
    D. Catkin is the pendulous spike in leaf axis which bears unisexual flowers. It is a type of racemose inflorescence. Examples are Morus, birch, and oak.

    So, the correct answer is 'raceme'. 
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