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Morphology of Flowering Plants Test 66

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Morphology of Flowering Plants Test 66
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  • Question 1
    1 / -0
    Staminodes commonly occur in
    Solution
    Staminode is an often rudimentary, sterile or abortive stamen, which means that it does not produce pollen. Staminodes are frequently inconspicuous and stamen like, usually occurring at the inner whorl of the flower, but are also sometimes long enough to protrude from the corolla. Caesalpinioideae flowers - Inflorescences racemes, spikes or cymes, flowers small to more often larger and showy, bracteoles small or absent. Flowers mostly slightly zygomorphic. Sepals usually free, commonly imbricate. Petals equal, free, upper one usually borne internally to the adjacent lateral petals. Stamens mostly 10 or fewer by reduction to staminodes, often of unequal size and long exserted, anthers usually opening by terminal pores or longitudinal slits.
    So, staminodes are characteristics of Caesalpinioideae and not of Liliaceae and Papilionaceae. 
    Therefore, the correct answer is option C.
  • Question 2
    1 / -0
    Spike of spikelets inflorescences commonly occurs in
    Solution
    Spike of spikelets inflorescences commonly occurs in Poaceae. Flowers of Poaceae are characteristically arranged in spikelets, each spikelet having one or more florets. The spikelets are further grouped into panicles or spikes. A spikelet consists of two bracts at the base, called as glumes, followed by one or more florets. A floret consists of the flower surrounded by two bracts, one external the lemma and one internal palea. 
    Therefore, the correct answer is option C.
  • Question 3
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    Pea nut or Ground nut oil is obtained from 
    Solution
    The peanut or groundnut (Arachis hypogaea) is a species in the family Fabaceae. The peanut was probably first domesticated and cultivated in the valleys of Paraguay. It is an annual herbaceous plant growing 30 to 50 cm tall. Peanut oil is often used in cooking, because it has a mild flavor and a relatively high smoke point. Due to its high monounsaturated content, it is considered healthier than saturated oils and is resistant to rancidity. There are several types of peanut oil including aromatic roasted peanut oil, refined peanut oil, extra virgin or cold pressed peanut oil and peanut extract. In the United States, refined peanut oil is exempt from allergen labeling laws.
    Peanut oil is not obtained from Lathyrus odoratus (sweet pea), Pisum sativum (garden pea), Glycine max (soya) or Brassica juncea (mustard). 
    Therefore, the correct answer is option C.
  • Question 4
    1 / -0
    Bipinnate leaves and spiny stipules are the characteristics of family
    Solution
    Bipinnate leaf is characterised by a presence of secondary rachii on the long main rachis (primary rachis). The secondary rachii bears pinnately arranged leaflets, thereby making it double pinnate, hence, the name is bipinnate. 
    Papilionaceae has simple or pinnate or palmately compound, nonspiny stipulate leaves.
    Cesalpinoideae has simple or pinnate or palmately compound, nonspiny stipulate leaves.
    Mimosoideae has simple or bipinnate or palmately compound, stipulate leaves. Stipules are spiny and hollow inside that provide shelter to ants. Malvaceae has simple or palmately compound, non spiny stipulate leaves.
    Therefore, the correct answer is option C.
  • Question 5
    1 / -0
    Long filamentous threads protruding at the end of a young cob of maize are
    Solution
    Long filamentous threads protruding at the end of a young cob of maize are styles. The apex of the stem ends in the tassel, an inflorescence of male flowers. When the tassel is mature and conditions are suitably warm and dry, anthers on the tassel dehisce and release pollen. Maize pollen is anemophilous and because of its large settling velocity, most pollen falls within a few meters of the tassel. Elongated stigmas, called as silks, emerge from the whorl of husk leaves at the end of the ear. They are often pale yellow and  like tufts of hair in appearance.
    At the end of each is a carpel, which may develop into a kernel if fertilized by a pollen grain. The pericarp of the fruit is fused with the seed coat referred to as caryopsis, typical of the grasses and the entire kernel is often referred to as the seed. The cob is close to a multiple fruit in structure, except that the individual fruits never fuse into a single mass. 
    Thus, the correct answer is option B.
  • Question 6
    1 / -0
    The family fabaceae is alternatively of
    Solution
    The Fabaceae or Leguminosae, commonly known as the legume, pea or bean family, are a large and economically important family of flowering plants. It includes trees, shrubs and herbaceous plants perennials or annuals, which are easily recognized by their fruit and their compound, stipulated leaves. The group is widely distributed and is the third-largest land plant family in terms of number of species, behind only the Orchidaceae and Asteraceae, with 630 genera and over 18,860 species. So, Fabaceae is an alternative of Leguminosae and not Solanaceae, Compositae and Malvaceae. 
    Therefore, the correct answer is option A.
  • Question 7
    1 / -0
    Colchicum plant which gives cholchicine alkalloid belongs to which family
    Solution
    Colchicum plant which gives cholchicine alkalloid belongs to which family Liliaceae. The plant contains the alkaloid colchicine which is used pharmaceutically to treat gout and Familial Mediterranean fever. The use of the roots and seeds in traditional medicine is thought to have arisen due to the presence of this drug.
  • Question 8
    1 / -0
    The perianth term used when
    Solution
    A) Correct option- B
    B) Explanation of correct option

    • Perianth is a collective term for outer parts of calyx and corolla enclosing androecium and gynoecium.
    • This term is used to refer petalideous monocotyledons, in which the calyx and corolla are combined that they cannot be distinguished from each other. 
    • Example - Plants of Liliaceae family.
  • Question 9
    1 / -0
    Presence of racemose head and bicarpellary syncarpus ovary with basal placentation belongs to
    Solution
    The family Compositeae or Asteraceae as it is presently referred to is characterized with an inflorescence which is a specialized capitulum or a flower head. This capitulum which is a racemose head is composed of numerous florets. Further the pistils with two connate carpels  makes it bicarpellary and the ovary which is  inferior has an ovule with basal placentation.
    Therefore, the correct answer is option B.
  • Question 10
    1 / -0
    Colchicum autumnale belongs to
    Solution
    Colchicum autumnale, commonly known as autumn crocus, meadow saffron or naked lady is a flower that resembles the true crocuses, but blooms in autumn. 
    The species is commonly cultivated as an ornamental in temperate areas, in spite of its toxicity. It belongs to family Liliaceae and not to Malvaceae, Cruciferae or Leguminosae. 
    Therefore, the correct answer is option C.
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