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Getting To Know Plants Test - 11

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Getting To Know Plants Test - 11
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Primary roots and its branches constitutes to
    Solution
    A. Adventitious roots are the roots which are produced from other plant parts like stems, leaves etc.
    B. Taproot system is the root system where the root develops from the radicle producing primary roots and its branches secondary roots. Here the radicle persists.
    C. Fibrous roots are the roots which are short and appear as a bunch when the radicle is absent.
    D. Seminal roots are temporary roots which are present during ungerminated caryopsis.
    So, the correct answer is 'Tap root system'.
  • Question 2
    1 / -0
    Hygroscopic roots occur in
    Solution
    Hygroscopic roots occur means water absorbing roots from the atmosphere. Hygroscopic roots occur in Vanda because it is an epiphyte which absorbs moisture from the atmosphere as its source of water.
    So, the correct option is 'Vanda'
  • Question 3
    1 / -0
    A plant with epidermis specialised to absorb mositure from air is?
    Solution
    A plant with epidermis specialized to absorb moisture from the air is Vanda because vanda is an epiphyte with modified epidermis called velamen. As it stays on the host plant branches, its roots hang in the air absorbing moisture from the atmosphere.
    So, the correct option is 'Vanda'.
  • Question 4
    1 / -0
    Roots do not present in:
    Solution
    A. Wolffia is a free-floating thallus, so its body does not contain roots.
    B. Ceratophyllum is a submerged or free-floating plant, so its roots are not developed.
    C. Utricularia is an aquatic plant that feeds on insects.
    As all the above-mentioned plants are aquatic plants, their root system is not properly developed.
    So, the correct answer is option D.
  • Question 5
    1 / -0
    What is the pattern of the veins in the leaves required for the conduction called?
    Solution
    The arrangement of veins and veinlets in the lamina of the leaf is known as venation. It is of two types: -
    1. Reticulate venation and 
    2. Parallel venation
    So, the correct option is (B).
  • Question 6
    1 / -0
    A flower which contains both stamen and pistil is called as
    Solution

    The flower is a reproductive organ of an angiosperm plant. The typical flowers consist of sepals, petals, stamens, and carpels. A flower having both stamens as well as carpels or pistils is known as a bisexual flower. Flowers that are either staminate (means having stamens) or pistillate (having pistils only) are known as unisexual flowers. Thus the answer is bisexual flowers.

    The correct option is A.

  • Question 7
    1 / -0
    In a flower, the male and female reproductive parts are ............. respectively.
    Solution
    Stamen and pistil are the male and female reproductive parts respectively.  Stamen has anther that produce pollen grains and stalk known as the filament. Pistil has stigma, style and ovary. The ovary contains egg-producing structures the ovules, the style, a hollow tube that receives the pollen tube and stigma that provides a platform for the pollen grains to land and germinate.
    So, the correct answer is 'Stamen and pistil'.
  • Question 8
    1 / -0
    Stilt roots are present in:
    Solution
    Stilt roots are adventitious roots that grow from lower stem nodes and join and become deeper in the soil. 
    They are found in sugarcane and maize because to provided mechanical support to the weak stems.
    So, the correct option is C. 
  • Question 9
    1 / -0
    The roots are important parts of the plant because:
    Solution
    Functions of roots:
    • It helps in the absorption of water and minerals.
    • Holds the soil, hence provide anchorage.
    • Modify to store food.
    • But, they don't carry out photosynthesis.
    • Provide support to the plant body.
    So the correct option is 'Both A and C'.
  • Question 10
    1 / -0
    Rootlets are called:
    Solution
    Rootlets are also called lateral roots and are defined as the small branches of roots that form from the main root and helps the plant for the absorption of water and minerals as they increase surface area.
    So, the correct option is 'Lateral roots'.
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