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Morphology of Flowering Plants Test 37

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Morphology of Flowering Plants Test 37
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  • Question 1
    1 / -0
    Capitulum inflorescence occurs in?
    Solution
    A. Verticillaster is a cluster of sessile or subsessile flowers borne on a dichasial cyme ending in monochasial cyme in the form of condensed whorl on either side of the nodes. An example is a salvia.
    B. Cyathium looks like a single flower. A cup-shaped involucre formed by bracts encloses a single female flower and a number of male flowers. The example is euphorbia.
    C. Capitulum or head bears many sessile and small florets. The main axis becomes flat and called receptacle. It is a type of racemose inflorescence. The example is marigold.
    D. Dichasial cyme in which two lateral branches develop on the two sides of the terminal flower. The example is jasmine.

    So, the correct answer is 'Marigold'.
  • Question 2
    1 / -0
    Scorpioid cyme occurs in
    Solution
    Scorpioid Cyme: When the lateral branches develop on alternate sides, forming a zigzag, the cymose inflorescence is known as scorpioid or alternate-sided cyme, e.g., in Gossypium (cotton), Drosera (sundew), Heliotropium, Freesia, etc.

    So, the correct answer is 'Heliotropium'.

  • Question 3
    1 / -0
    Verticillaster inflorescence occurs in?
    Solution
    Verticillaster is a cluster of sessile or subsessile flowers borne on a dichasial cyme ending in monochasial cyme (scorpioid) in the form of condensed whorl on either side of the node. Examples: Ocimum (Tulsi) and Salvia (Lamiaceae).

    So, the correct answer is 'Ocimum'.
  • Question 4
    1 / -0
    Find out the correct sequence in the labelling of diagram.

    Solution

    In the raceme peduncle is elongated, flowers are pedicellate. In spike, the central axis is elongated but flowers are sessile.

    In dichasial cyme, the peduncle bears two bracts at a node from which two branches arise.

    In the monochasial cyme, the single lateral branch will arise from the peduncle of the old flower. The lateral branch also terminates in the flower.

    Therefore, the correct answer will be A-raceme, B-spike, C-monochasial cyme, D-dichasial cyme.

    The correct option is C.  

  • Question 5
    1 / -0
    Cymose inflorescence is found in?
    Solution
    Inflorescence is of two types racemose and cymose. Cymose inflorescence, in which the main axis terminates into a flower and has limited growth. The flowers are borne in a basipetal order. Example: Solanum, Dianthus, Begonia, and teak. Racemose inflorescence in which, the shoot axis continue to grow indefinitely and the flowers are borne in acropetal succession. Example: sesbania, Trifolium and brassica (mustard and radish).

    So, the correct answer is 'Solanum'.
  • Question 6
    1 / -0
    In cymose inflorescence, the main axis _________.
    Solution

  • Question 7
    1 / -0
    The type of inflorescence, in a plant showing polygamous condition and lateral style is?
    Solution
    The type of inflorescence, in a plant showing polygamous condition and lateral style is compound corymb.
    Compound corymb is a botanical term for an inflorescence with the flowers growing in such a fashion that the outermost are borne no longer pedicels than the inner, bringing all flowers up to a common level.
  • Question 8
    1 / -0
    Match and find the correct option.
    III
    (a)Solitary cyme(i)Solanum
    (b)Monochasial cyme(ii)Ipomoea
    (c)Cymule(iii)Datura
    (d)Polychasial cyme(iv)Nerium
    Solution
    • Datura is a shrub-like annual or perennial herb, 
    Inflorescence - solitary and axillary cyme, 
    • Solanum is a large and diverse genus of flowing plants.
    Inflorescence - Monochasial cyme,
    • Nerium oleander is a shrub or small tree in the dogbane family Apocynaceae.
    Inflorescence - Cymule
    • Ipomoea is the largest genus in the flowering plant family convolvulaceae.
    Inflorescence - Polychasial cyme.

    $$\therefore a - iii, b - i , c - iv, d - ii$$
  • Question 9
    1 / -0
    Ratio between number of stamens in nine male flowers and number of carpels in three female flowers in Euphorbia is?
    Solution

  • Question 10
    1 / -0
    Inflorescence is racemose in.
    Solution
    Inflorescence is of two types racemose and cymose. Cymose inflorescence, in which the main axis terminates into a flower and has limited growth. The flowers are borne in a basipetal order. Example Solanum (brinjal), Dianthus, Begonia, tulip, aloe and teak. Racemose inflorescence in which, the shoot axis continue to grow indefinitely and the flowers are borne in acropetal succession. Example is sesbania, trifolium, legumes (spyabean) and  brassica (mustard and radish).
    So, the correct answer is 'soyabean'.
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