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Morphology of Flowering Plants Test 33

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Morphology of Flowering Plants Test 33
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  • Question 1
    1 / -0
    In cyathium, the ratio between female to male flowers is?
    Solution
    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 single stamen while a single pistil represents a female flower. It is type of cymose inflorescence. Example is euphorbia. Therefore, the ratio is one : many.

    So. the correct answer is 'One: Many'.
  • Question 2
    1 / -0
    In a cymose inflorescence, the peduncle ends in?
    Solution
    The arrangement of flowers on the floral axis of the plant is known as inflorescence. It is of two major types - racemose and cymose. Cymose inflorescence, the main axis (peduncle) terminates into a flower and hence has limited growth, therefore it ends in a single flower. The flowers are arranged in basipetal order. Example: teak.

    So, the correct answer is 'a single flower'.
  • Question 3
    1 / -0
    The flowers of a raceme are arranged?
    Solution
    Raceme: a flower cluster with the separate flowers attached by short equal stalks at equal distances along a central stem. The flowers at the base of the central stem develop first. peduncle has bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. Example: radish.

    So, the correct answer is 'Acropetally'.
  • Question 4
    1 / -0
    The inflorescence of Grass$$/$$ Sedge$$/$$ Rice$$/$$ family gramineae is?
    Solution
    A. Spike in which peduncle has bisexual and sessile flowers. It is a type of racemose inflorescence. The example is Achyranthes.
    B. Thyrsus in which a number of cymose clusters are borne acropetally on an unlimited axis in the manner of a raceme. Example: grapevine.
    C. Spikelet is a small and special spike. Flowers are produced in the axil of fertile bracts called lemma. It is a type of racemose inflorescence. Examples are grass, sedge, wheat, rice and family Gramineae.
    D. Raceme in which peduncle has bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. The example is a radish.

    So, the correct answer is 'Spikelet'.
  • Question 5
    1 / -0
    The inflorescence in compositae family  is?
    Solution
    A. Capitulum or head bears many sessile and small flowers. The main axis becomes flat and called receptacle. It is a type of racemose inflorescence. The example is the Compositae (Asteraceae) family.
    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. Umbel in which the main axis is reduced very much and all flowers appear to be arising from the same point. It is a type of racemose inflorescence. The example is hydrocotyle.
    D. Catkin is the 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 'Capitulum'.
  • Question 6
    1 / -0
    Inflorescence having a flattened axis, sessile flowers and a whorl of involucral bracts 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, the cluster of bracts forming an involucre. It is a type of racemose inflorescence. The example is hydrocotyle.
    B. Capitulum or head bears many sessile and small florets. The main axis becomes flat and called receptacle. It has a whorl of involucre bracts. It is a type of racemose inflorescence. The example is the sunflower. 
    C. Corymb in which the main axis is short and 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 cymose inflorescence. The example is iberis.
    D. Raceme in which peduncle has bisexual and pedicellate flowers arranged acropetally. It is a type of racemose inflorescence. The example is a radish.

    So, the correct answer is 'Head/Capitulum'.
  • Question 7
    1 / -0
    A number of sessile flowers grow on a suppressed peduncle forming a globose inflorescence is called?
    Solution
    A. Catkin is the pendulous spike in leaf axis which bears unisexual flowers. It is a type of racemose inflorescence. The example is oak.
    B. Corymb in which the main axis is short and 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. Umbel in which the main axis is reduced very much and all flowers appear to be arising from the same point. It is a type of racemose inflorescence. The example is hypocotyl.
    D. Capitate in which a large number of sessile flowers grow from a suppressed rachis giving rise to a more or less globose structure. The example is mimosa.

    So, the correct answer is 'Capitate'.
  • Question 8
    1 / -0
    The inflorescence present in Euphorbia is?
    Solution
    A. 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 single stamen while a single pistil represents a female flower. It is type of cymose inflorescence. Example is euphorbia (Poinsettia)
    B. Capitulum o head bears many sessile and small florets. Main axis becomes flat and called receptacle. It is type of racemose inflorescence. Example is sunflower.
    C. Helicoid cyme In which each flowering branch gives rise to one lateral branch that is coiled snail-like and then expanded.
    D. 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. It is a type of cymose inflorescence. Example: Tulsi.

    So, the correct answer is 'Cyathium'.
  • Question 9
    1 / -0
    A biparous cyme ending in uniparous cymes constitutes?
    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 node. The example is Tulsi.
    B. Panicle in which peduncle is branched and branches have pedicellate flowers. It is a type of racemose inflorescence. The example is gulmohur.
    C. Thyrsus in which a number of cymose clusters are borne acropetally on an unlimited axis in the manner of a raceme. The example is a grapevine.

    So, the correct answer is 'Verticillaster'.
  • Question 10
    1 / -0
    Hypanthodium is?
    Solution
    A. Thalamus is the swollen, basal part of the pedicel or the stalk.
    B. Fruit is the presence of flowering plants or the angiosperms. After fertilization, the ripened ovary or mature ovary is called fruit.
    C. The inflorescence is the arrangement of flowers on the floral axis of the plant. Hypanthodium is fleshy receptacle forming a hollow cavity with an apical opening called ostiole. The example is ficus.
    D. The ovary is the basal swollen part of the carpel and female reproductive organ.

    So, the correct answer is 'Inflorescence'.
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