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Morphology of Flowering Plants Test 28

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Morphology of Flowering Plants Test 28
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  • Question 1
    1 / -0
    Inflorescence consisting of sessile bisexual flowers arranged acropetally on an elongated axis is?
    Solution
    A. The spadix is the 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. An example is palm.
    B. Catkin is a pendulous spike in leaf axis which bears unisexual flowers. It is a type of racemose inflorescence. An example is oak.
    C. Raceme in which peduncle have bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. An example is radish.
    D. Spike in which peduncle have bisexual and sessile flowers with the acropetal arrangement. It is a type of racemose inflorescence. An example is Achyranthes.

    So, the correct answer is 'Spike'.
  • Question 2
    1 / -0
    The inflorescence of Coriander is?
    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 forming an involucre. It is a type of racemose inflorescence. An example is hydrocotyle.
    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. Typical raceme is peduncle having bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. Examples are Larkspur and radish.
    D. Umbel of umbels is also called a compound umbel. It is a type of racemose inflorescence. An example is coriander.

    So, the correct answer is 'Umbel of umbels'.
  • Question 3
    1 / -0
    In a compound umber, each umbellule is subtended by.
    Solution
    Compound umbel is when the axis of an umbel branches. At the base of flowers, cluster of bracts form an involucre. The involucres of the compound umbels is called involucels. Example is coriander. 
    Bracts are reduced leaf found at the base of the pedicel. The flowers with bracts are called bracteate. 
    So, the correct answer is 'Involucel'.
  • Question 4
    1 / -0
    Petiole part of the leaf is also known as
    Solution
    The foliage leaf consists of three parts, namely leaf base, petiole and lamina. The leaf base is also called as hypopodium. The petiole part of the leaf is also called as mesopodium. The lamina part of the leaf is called as epipodium.
    Thus, the correct answer is 'Mesopodium.'
  • Question 5
    1 / -0
    Racemose inflorescence having branched peduncle is?
    Solution
    A. Panicle has peduncle branched and branches have pedicellate flowers. When the main axis of raceme is branched and the lateral branches bear the flowers, the inflorescence is known as compound raceme or panicle. Example: Gulmohur.
    B. Corymb in which lower flowers have long pedicles than upper ones so that all the flowers are brought more or less to the same level. The main axis is short.
    C. Corymbose raceme is found in mustard.
    D. Spikelet has a small and special spike. Flowers are produced in the axil of fertile bracts called lemma. Example: wheat.

    So, the correct answer is 'Panicle'.
  • Question 6
    1 / -0
    Multiparous cyme occurs in ________
    Solution

    Multiparous or Polychasial Cyme: In this type of cymose inflorescence the main axis culminates in the flower. The whole inflorescence looks like the umbel but is readily distinguished by the opening of the middle flower first, for example, Calotropis Procera. Jasmine is biparous cyme. Solanum nigrum is a sympodial cyme and Heliotropium is the scorpioid cyme.

    Thus the correct option is D. 

  • Question 7
    1 / -0
    The arrangement of flowers in Sunflower(Helianthus annuus) is?
    Solution
    A. Acropetal is that younger flowers are present towards the apex and the older flowers are present at the base. It is seen in racemose inflorescence. Example: Radish and Mustard.
    B. Basipetal is opposite of acropetal. The younger flowers are present at the base and old flowers are present towards the apex. It is seen in cymose inflorescence. Example: teak.
    C. Centripetal is the peripheral flowers mature first and then maturation proceeds towards the center. It is seen in racemose inflorescence. Example: sunflower.

    So, the correct answer is 'Centripetal'.
  • Question 8
    1 / -0
    In a raceme, the flower arrangement is?
    Solution

    • In a raceme the peduncle has bisexual and pedicellate flowers arranged acropetally. Example: Radish. It is a type of racemose inflorescence, in which the shoot axis continue to grow indefinitely and the flowers are borne in an acropetal succession that is, younger flowers are present towards the apex and the older flowers are present at the base. 
    • Basipetal has seen in cymose inflorescence in which the main axis terminates into a flower and has limited growth.

    So, the correct answer is 'Acropetal'.
  • Question 9
    1 / -0
    In which of the following, the growing point ends in a flower?
    Solution
    A. Raceme in which peduncle have bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. Example: radish.
    B. 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 node. It is a type of cymose inflorescence which has limited growth. Example: tulsi.
    C. Catkin is a pendulous spike in leaf axis which bears unisexual flowers. It is a type of racemose inflorescence. Example: oak.
    D. Spike in which peduncle have bisexual and sessile flowers with an acropetal arrangement. It is a type of racemose inflorescence. Example: Achyranthes.

    So, the correct answer is 'Verticillaster'. 
  • Question 10
    1 / -0
    An inflorescence appearing like a flower which is cymose is?
    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, a cluster of bracts forms an involucre. It is a type of racemose inflorescence. An example is hydrocotyle.
    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. 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. Examples are Poinsettia and Pedilanthus.
    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.  An example is sunflower.

    So, the correct answer is 'Cyathium'.
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