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Anatomy of Flowering Plants Test - 72

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Anatomy of Flowering Plants Test - 72
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  • Question 1
    1 / -0
    Identify the correct statement for monocotyledonous root
    Solution
    D. All of the above
    EXPLANATION: Monocotyledonous root contains epidermis, cortex, endodermis, pericycle, xylem, phloem and a pith. Pith is extended into the flowering stems and roots. Pith in monocotyledonous root is large and well developed. In monocotyledonous root secondary growth does not occur, because of the absence of cambium in vascular bundle in between xylem and phloem. But there is exceptions like in Draceana. In Draceana secondary growth is seen. In polyarch condition many bundles of xylem is present. In monocotyledonous root polyarch condition is seen.  
  • Question 2
    1 / -0
    Which of the following vascular bundles are always open?
    Solution
    Answer is option C i.e. "Bicollateral"
    A vascular bundle is a part of the transport system in vascular plants which includes xylem and phloem tissues.
    Bicollateral vascular bundles are always open. Here, xylem is situated in middle of two phloem strands. Example: stem of Cucurbita. These bundles are called open type as strips of cambia are present but the secondary thickening occurs only by the outer cambium.
  • Question 3
    1 / -0
    Read the  following statements and choose the correct option. 
    a) Pith is large and well developed in roots of monocot plants.
    b) Bundle sheath is  presents in dicot stem.
    c) Water containing cavities are present within vascular bundles of monocot stem.
    Solution
     In dicot stem, bundle sheath is absent, while in monocot stem the bundle sheath is present as it surrounds the scattered vascular bundles. So the correct option is 'Only (b) is incorrect'.
  • Question 4
    1 / -0
    Monocotyledonous root differs from dicot root in which of the following internal features (a to d)?

    a. Presence of parenchymatous pericycle
    b. Absence of fewer xylem bundles
    c. Presence of large and well-developed pith
    d. Presence of parenchymatous cortex without intercellular spaces

    Find out the correct option.
  • Question 5
    1 / -0
    The fallen stem in grasses gets erected by the help of
    Solution
    A wooden stem has a continuous growth in the diameter due to the cambium, forming secondary wood (xylem-phloem). Instead, grasses have a stem structure with numerous vascular bundles scattered in a ground tissue of parenchyma storing cells, which is surrounded by a strong and dense epidermis.
    So, the correct answer is 'Vascular cambium'.
  • Question 6
    1 / -0
    Secondary meristem develops from?
  • Question 7
    1 / -0
    The number of xylem bundles in monocot roots are:
    Solution
    D. 8
    Reason: The tissue at the center of monocot roots consists of xylem and phloem (vascular strand) and it is surrounded by the cortex. Vascular strand is in the form of several (8 or more) alternate and radial xylem and phloem bundles.
  • Question 8
    1 / -0
    Which of the following is a character of meristematic tissue ? 
    Solution
    Meristematic cells are actively dividing undifferentiated cells present at different locations in a plant body which helps in the primary and secondary growth in plants.
    The characteristics of meristematic cells are:-
    1)The cells are isodiametric with thin cellulosic cell walls with no secondary cell wall.
    2) They divide rapidly hence, there is no stored food in these cells.
    3) They are compactly arranged cells with no intercellular spaces.
    4) They have a dense cytoplasm with a prominent nucleus.
    5) Endoplasmic reticulum and mitochondria are not fully developed in these cells.
    6)  They are the most metabolically active cells.
    7) Presence of prominent nucleus since Meristematic tissues are dividing cells and metabolically active cells
    So, the correct option is (A)
  • Question 9
    1 / -0
    In a large tree most metabolic energy is utilized by:
    Solution
    The purpose of photosynthesis is to capture and store energy. The green light is the only. A large tree may move as much as 50-100 gallons of water on kinds of growth tissue, at the twig tips and cambium under the bark. glucose is used by trees (and most other living things) to drive metabolic processes that produce. So, the correct option is "A" (Cambium).
  • Question 10
    1 / -0
    The most active part dicot root with respect to growth is _______.
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