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Morphology of Flowering Plants Test 23

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Morphology of Flowering Plants Test 23
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  • Question 1
    1 / -0
    Which family is included under coronariae?
    Solution
    Series Cronariae in Bentham and Hooker classification of angiosperms includes under monocot families with perianth which is petaloid and ovary is superior and these characters belong to family Liliaceae.
    So the correct option is 'Liliaceae'.
  • Question 2
    1 / -0
    Adventitious roots are adventitious in their
    Solution
    Some roots, called adventitious roots, arise from an organ other than the root usually a stem, sometimes a leaf. They are especially numerous on underground stems, such as rhizomes, corms, and tuber and make it possible to vegetatively propagate many plants from stem or leaf cuttings. 
    So, the correct option is 'Place of origin'.
  • Question 3
    1 / -0
    Pneumatophores possess
    Solution
    • Pneumatophores are specialized root structures that grow out from the water surface and facilitate aeration necessary for respiration in hydrophytic trees.
    • Lenticels, which are the medium for respiration, did this function.
    • Lenticels are small openings (lenticels) through which air enters, passing through the soft spongy tissue to the roots beneath the mud.

    So, the correct option is 'Lenticels'.
  • Question 4
    1 / -0
    Bell shaped flowers are found in 
    Solution
    1. Maize has an inflorescence of spikelets as flowers are born on an axis called rachilla surrounded by bracts.
    2. Datura flower is bell-shaped and a solitary flower.
    3. Chrysanthemum often shows solitary head inflorescence.
    4. Marigold has spike inflorescence means with short or no pedicel are elongated and unbranched peduncle.
    So, the correct option is 'Datura'.
  • Question 5
    1 / -0
    Nodulated roots make the plant rich in
    Solution
    Nodulated roots make the plant rich in proteins because nodulated roots contain nitrogen-fixing bacteria that fix nitrogen, which in turn is used to form proteins.
    So, the correct option is 'Proteins'.
  • Question 6
    1 / -0
    Epiphytic roots occur in
    Solution
    Epiphytic roots occur in orchids because the plant grows on trees and the roots hang freely in the air and absorb moisture with the help of a special sponge-like tissue called velamen. Velamen is modification of epidermis. 
    The correct option is 'Orchids'.
  • Question 7
    1 / -0
    Haustoria or sucking roots occur in
    Solution
    The roots occur in parasite for absorbing nourishment from the heat. Hence they are also called sucking roots. Cuscuta has non-green stems and scale leaves. It does not have any connection with the soil. The parasite sends haustorial roots into the host. They make a connection with both xylem and phloem of host absorbing both water and food. 
  • Question 8
    1 / -0
    Prop or pillar roots are
    Solution
    Prop roots are adventitious roots because these roots are grown from places other than the radicle. These roots provide additional support to the plant.
    So, the correct option is 'Adventitious roots'.
  • Question 9
    1 / -0
    Radish has
    Solution
    Radish roots are called fusiform roots because, the roots of this plant store food which gives the root a spindle shaped appearance. Fusiform means spindle shaped.
  • Question 10
    1 / -0
    Economically important edible part of Ipomoea batatas is?
    Solution
    The swollen roots do not assume a definite shape. They are the modification of adventitious roots. for storage of food. They occur singly.
    Eg- Sweet potato. 
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