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Morphology of Flowering Plants Test 31

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Morphology of Flowering Plants Test 31
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  • Question 1
    1 / -0
    Development of flowers from old stems is an example of?
    Solution
    A. Coenanthium in which the receptacle becomes saucer-shaped with the margins slightly curved up. Example is dorstenia
    B. Cauliflory is a botanical term referring to plants that flower and fruit from their main stems or woody trunks rather than from new growth and shoots. This can allow trees to be pollinated or have their seeds dispersed by animals which cannot climb or fly.
    C. Solitary flowers are found in China rose.
    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 example is ficus.

    So, the correct answer is 'Cauliflory'.
  • Question 2
    1 / -0
    In Banana, the inflorescence is?
    Solution
    A. Thyrsus in which a number of cymose clusters are borne acropetally on an unlimited axis in the manner of the raceme. The example is a grape vine.
    B. The spadix is a spike with a fleshy axis and having both male and female flowers. It is a type of racemose inflorescence. The example is palm.
    C. The mixed spadix is cymose groups of flowers are arranged in acropetally on the fleshy axis. The example is a banana.

    So, the correct answer is 'mixed spadix'.
  • Question 3
    1 / -0
    The inflorescence in Mulberry (Morus) is?
    Solution
    A. 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 palm.
    B. Catkin is a pendulous spike in leaf axis which bears unisexual flowers. Catkin (Amentum) is a compact pendent unisexual spike in which peduncle is thin and weak. e.g., Morus (Mulberry), Populus (Poplar), Acalypha (Cats tail), Salix (Willow), Betula (Birch). It is a type of racemose inflorescence. The example is mulberry.
    C. Spike in which peduncle has bisexual and sessile flowers. It is a type of racemose inflorescence. The example is Achyranthes.
    D. 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 the sunflower.

    So, the correct answer is 'Catkin'. 
  • Question 4
    1 / -0
    Biparous or Dichasial Cyme occurs in?
    Solution
    A. Cymose inflorescence in which the main axis terminates into a flower and has limited growth. The flowers are borne in a basipetal order. The example is a begonia.
    B. Dichasial cyme in which two lateral branches develop on the two sides of the terminal apical flower. The example is dianthus.
    C. Polychasial cyme in which there being more than two lateral branches from the base of the apical flower. The example is calotropis.
    D. Coenanthium in which the receptacle becomes saucer-shaped with the margins slightly curved up. The example is dorstenia.

    So, the correct answer is 'Dianthus'.
  • Question 5
    1 / -0
    The inflorescence of Brassica campestris is?
    Solution
    A. Raceme in which peduncle has bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. The example is a radish.
    B. Corymb in which the main axis is short. Lower flowers have long pedicels than upper ones so that all the flowers are brought more or less to the same level. It is a type of racemose inflorescence. The example is iberis.
    C. Corymbose raceme is found in the mustard family (Brassica campestris).
    D. 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 palm.

    So, the correct answer is 'Corymbose raceme'.
  • Question 6
    1 / -0
    Spike has?
    Solution
    A. Raceme in which peduncle has bisexual and pedicellate flowers arranged in acropetally. It is a type of racemose inflorescence. The example is a radish.
    B. The complete arrangement of flowers on the floral axis of the plant is called an inflorescence. It is of two major types - racemose and cymose.
    C. Spike in which peduncle has bisexual and sessile flowers. It is a type of racemose inflorescence. The example is Achyranthes.
    D. Catkin is a pendulous spike in leaf axis which bears unisexual flowers.  It is a type of racemose inflorescence. The example is oak.

    So, the correct answer is 'Sessile flowers'.
  • Question 7
    1 / -0
    In helicoid cyme, the lateral flowers arise _______
    Solution
    A) On the same side
        When the lateral axes develop successively on the same side, forming a sort of helix, the cymose inflorescence is known as helicoid or one-sided cyme, e.g., in Begonia, Juncos, Henerocallis and same members of solanaceae. 
  • Question 8
    1 / -0
    Capitulum with two types of florets is called?
    Solution
    Capitulum or head bears many sessile and small florets. The main axis becomes flat and called receptacle. Peripheral florets called ray florets are pistillate or neuter and zygomorphic, whereas disc florets are bisexual and actinomorphic is called heterogamous. It is a type of racemose inflorescence. The example is the sunflower.

    So, the correct answer is 'Heterogamous'.
  • Question 9
    1 / -0
    Inflorescence with unbranched axis is called ________
    Solution
    C) Simple racemose 
        A raceme is an inflorescence in which a flower develops at the axial of each leaf along an elongated, unbranched axis. Each flower terminates a short stalk called a pedicel. 
  • Question 10
    1 / -0
    Corymb has?
    Solution
    Corymb in which the main axis (peduncle) is short. Lower flowers have long pedicles than upper ones so that all the flowers are brought more or less to the same level. It is a type of racemose inflorescence. The example is Iberis.

    So, the correct answer is 'Shorter peduncle'.
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