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Morphology of Flowering Plants Test 38

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Morphology of Flowering Plants Test 38
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  • Question 1
    1 / -0
    The inflorescence found in coconut plant is
    Solution
    A. The compound spadix is formed when the axis of spadix branches as in coconut and in many other palms. The whole is covered by a stiff boat-shaped spathe but some palms may have smaller spathes for separate segments of the spadix.
    B. 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. An example is ficus.
    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. An example is a euphorbia.
    D. 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. An example is tulsi.

    So, the correct answer is 'compound spadix'.
  • Question 2
    1 / -0
    _______ shows compound inflorescence.
    Solution
    The flowers of the neem plant show compound racemose inflorescence in which the main axis of raceme is branched and the lateral branches bear the flowers, this is also called compound panicle inflorescence. Therefore, Neem shows compound inflorescence. 
  • Question 3
    1 / -0
    Identify the right combination.
    Solution
    A. Carrot is a modification of root in storage or tuberous root. It shows umbel inflorescence. 
    B. Onion is a modification of stem in a bulb. It shows scapigerous umbel inflorescence.
    C. Colocasia is a modification of stem in corm. It shows spadix inflorescence.
    D. Bougainvillea is a modification of stem in thorn. It shows cymose inflorescence.

    So, the correct answer is 'Bougainvillea - Thorns - Cymose'.
  • Question 4
    1 / -0
    What type of inflorescence can be seen in the diagram?

    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 a single stamen while a single pistil represents a female flower. 
    B. Dichasial cyme in which two lateral branches develop on the two sides of a terminal (oldest) flower. Biparous cyme branching is seen. The example is jasmine.
    C. 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 forms an involucre. 
    D. Panicle in which peduncle is branched and branches have pedicellate flowers.
    E. 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. 

    So, the correct answer is 'Cyathium'.
  • Question 5
    1 / -0
    Diplostemonous androecium occurs in _______.
    Solution
    Diplostemonous androecium occurs in murraya. It is a bearing small, white, scented flowers. The species is widely grown as an ornamental tree or hedge. In displostemonous condition, two whorls of stamens are found, stamens of outer, whorl are alternate with petals, while the stamens of inner whorl are opposite to petals. e.g. Murraya exotica.
    Therefore, It occurs in Murraya. 
  • Question 6
    1 / -0
    Papilionaceous corolla occurs in
    Solution
    Papilionaceous corolla is characterised with butterfly-shape because the petals are of different sizes and they show descending pattern of imbrication. The largest posterior petal is called vexillum and it overlaps the lateral petals called wings. The wings overlap the innermost fused petals called keel or carina. It is a characteristic of the family Fabaceae.
    Hence, the correct answer is 'Fabaceae'
  • Question 7
    1 / -0

    Aeschynomene belongs to family

    Solution
    Aeschynomene is a genus of flowering plants belonging to the family Fabaceae. They are commonly known as joint vetches. These legumes are more common in warm regions and many species are aquatic.
    So, the correct answer is 'Fabaceae'.
  • Question 8
    1 / -0
    The axis bearing flowers in a spikelet is called?
    Solution
    A. Spikelet is a small and special spike. Flowers are produced in the axil of fertile bracts called lemma. Rachilla is the axis of spikelet of grass.
    B, Peduncle is the main axis of inflorescence or stalk bearing flower or fruit.
    C. A receptacle is the flat main axis seen in capitulum or head. 
    D. Scape is a long internode forming the basal part or whole of the peduncle. 

    So, the correct answer is 'Rachilla'.
  • Question 9
    1 / -0
    Artocarpus possesses _________
    Solution

    Jackfruit belongs to the genus of Artocarpus, which bears the largest fruit i.e. longest inflorescence of all trees. It can be as much as 55 kg in weight, 90 cm in length, and 50 cm in diameter. A mature jack tree will produce some 200 fruits per year. With older trees bearing up to 500 fruits in the year.

    So the correct option is A.

  • Question 10
    1 / -0
    Longest inflorescence is that of.
    Solution

    The flowers of Cassia fistula are grouped in the axillary and many-flowered racemes. These inflorescences are large in size and up to 15-40 cm long, pendulous and bright yellow. Long inflorescence of Cassia fistula from Sri Lanka and reaching up to 238 cm. It can be considered as the longest recorded legume inflorescence.

    So the correct option is B.

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