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Morphology of Flowering Plants Test 20

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Morphology of Flowering Plants Test 20
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  • Question 1
    1 / -0
    The pair of small leaves at the base of petiole are called
    Solution
    Stipule is a pair of small leaflike appendage present at the base of petiole in many plants. Stipules may appear as glands, scales, hairs, spines or leaf-like structures. They protect the emerging leaf or bud. Thus the correct answer is 'stipule'.

  • Question 2
    1 / -0
    The type of inflorescence in a plant showing polygamous condition and lateral styles is
    Solution
    Umbel is a type of inflorescence in which the flowers have short pedicels and are connected to a common point on the inflorescence axis. Head is a type of inflorescence in which many flowers are grouped together to form a single flower-like structure. Raceme is a type of inflorescence in which the inflorescence axis never terminates in a flower. A corymb is a type of inflorescence in which the flowers are arranged in such a way that the outermost flowers have longer pedicels which bring all the flowers to a common height.
    Thus, the correct answer is option D
  • Question 3
    1 / -0
    Inflorescence of Ficus is
    Solution
    Ficus is a genus with nearly 850 species of trees, shrubs, vines in the family Moraceae. Collectively known as fig trees this shows a special type of inflorescence known as the Hypanthodium where the receptacle is fleshy and forms hollow ball like structure with an apical opening. Three types of flowers develop on the inner surface of the receptacle with female flowers towards the base, male flowers towards the orifice and short styled sterile female flowers in between. The multiple fleshy fruit thus formed has the ovaries borne within an enlarged succulent concave or hollow receptacle and is referred to as syconium.
    Therefore, the correct option is B.
  • Question 4
    1 / -0
    Which of the following manufactures the food and supplies it to other floral parts?
    Solution
    Sepals form the outermost whorl of a flower. They are modified leaves which are mostly green in color. Sepals are collectively called calyx. They protect the developing bud from injury and retain its moisture. They also perform photosynthesis and may supply food to other floral parts. 
    So, the correct answer is 'Sepals'

  • Question 5
    1 / -0
    Calotropis is the botanical name for
    Solution
    Calotropis is a genus of flowering plants in the dogbane family, Apocynaceae, first described as a genus in 1810. It is native to southern Asia and North Africa. They are commonly known as milkweeds because of the latex they produce. Calotropis species are considered common weeds in some parts of the world. The flowers are fragrant and are often used in making floral tassels in some mainland Southeast Asian cultures. Fibers of these plants are called as madar or mader. Calotropis species are usually found in abandoned farmland. Lotus is Nelumbo nucifera. Jasmine is Jasminum sp. Oleander is Nerium sp. 
    Therefore, the correct answer is option C.
  • Question 6
    1 / -0
    Match ligule with one of the followings
    Solution
    The ligule is part of the leaf that is found at the junction of the blade and sheath of the leaf. It may take several forms, but it is commonly some form of translucent membrane or a fringe of hairs.

  • Question 7
    1 / -0
    Identify the plant, if veins are appearing parallel on leaves.
    Solution
    If the veins on the the leaf run parallel to each other throughout the leaf, it is known as parallel venation. It is a feature of monocotyledonous plant. This type of veins are found in grasses.
  • Question 8
    1 / -0
    Verticillaster inflorescence is the characteristic of family
    Solution
    Verticillaster is a special type of inflorescence seen in Leucas. At each node of the stem two axillary opposite cymose inflorescences develop on either side. The cyme in the axil of each leaf, starts as a dichasial cyme but subsequently become monochasial scorpioid cyme. As a result, the cyme bends round the stem on either side and meets a similar cyme from the opposite side. Hence, at each node there is a cluster of flowers completely surrounding the stem. It is a characteristic of family Labiatae. 
    Cucurbitaceae family shows axillary solitary inflorescence. 
    Thyrse inflorescence is a characteristic of Rubiaceae family. 
    Capitulum inflorescence is a characteristic of family Asteraceae. 
    Therefore, the correct answer is option C.
  • Question 9
    1 / -0
    Evaporation in plants is restricted by
    Solution
    Leaf cuticle is protective covering on leaf epidermis and is composed of cutin, an insoluble heterogenous lipid polymer of long chain substituted aliphatic acids. Hence, it serves as water impervious layer to prevent water loos through transpiration. Stomata are the organs of transpiration which are present in the epidermis and their opening and closing are regulated by the change in turgidity of guard cells. Thus, the correct answer is C.
  • Question 10
    1 / -0
    The plant which opens during nights and closes in daytime is 
    Solution
    The plant which opens during nights and closes in daytime is night queen. It is called as raat ki rani in India. It is an evergreen woody shrub growing to 4 metres (13 ft) tall. The leaves are simple, narrow lanceolate, 6–20 centimetres (2.4–7.9 in) long and 2–4.5 centimetres (0.79–1.77 in) broad, smooth and glossy, with an entire margin.
    The flowers are greenish-white, with a slender tubular corolla 2–2.5 centimetres (0.79–0.98 in) long with five acute lobes, 10–13 millimetres (0.39–0.51 in) diameter when open at night, and are produced in cymose inflorescences. A powerful, sweet perfume is released at night.
    The fruit is a berry 10 millimetres (0.39 in) long by 5 millimetres (0.20 in) diameter, the colour of an aubergine. There is also a variety with yellowish flowers.
    Night-blooming jasmine blooms when the weather is warm, and its narrow, tubular, greenish-white blossoms only open at night. The flowers produce a strong, sweet fragrance that attracts moths and butterflies. Glossy white berries follow the flowers. It works well as a specimen plant or as a border shrub, or as a fragrant addition to a butterfly garden. 
    Touch-me-not is a creeping annual or perennial herb of the pea family.
    Vallisneria is a genus of freshwater aquatic plant, commonly called eelgrass, tape grass or vallis. 
    Therefore, the correct answer is option A.
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