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Anatomy of Flowering Plants Test - 35

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Anatomy of Flowering Plants Test - 35
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  • Question 1
    1 / -0
    Vascular cambium of stem is _______________.
    Solution

    In vascular plants, the secondary growth occurs due to the activity of the two lateral meristems- the cork cambium and the vascular cambium.

    In woody plants, the secondary growth produces wood and gives shapes to the plant with a thickened trunk.

    The vascular cambium is also known as fascicular cambium which develops within the vascular bundles that produce xylem to the inner side and phloem to the outer side.

    The vascular cambium is responsible for only secondary growth.

    So, the correct answer is 'Secondary meristem'.

    The correct option is C.

  • Question 2
    1 / -0
    A group of cells having a common origin and performing similar function is called as
    Solution
    Organ is a collection of tissues combined in a structural unit to perform a common function. 
    Organ system is a unit in which many organs work together to carry out one particular function. For example- cardiac cycle is carried out by heart, blood vessels and blood. 
    Cell aggregate is an aggregation of cells at a particular site in a particular situation, e.g. when blood vessels being ruptured then platelets become aggregated at that site. 
    A group of cells having a common origin and performing a similar function is called as tissue. 
  • Question 3
    1 / -0
    What are the characteristics of permanent tissue?
  • Question 4
    1 / -0
    Bicollateral vascular bundles have tissue arrangement.
    Solution
    A) Outer phloem - Outer cambium - Middle xylem - cambium - Inner phloem
    The vascular bundle having the phloem and cambium strands on both the outer and inner sides of the xylem is called bicollateral. This arrangement is in the sequence of outer phloem, outer cambium, xylem, inner cambium, and inner phloem e.g., cucurbita. 
  • Question 5
    1 / -0
    Collenchyma differs from sclerenchyma in________________.
    Solution
    Both collenchyma and sclerenchyma cells have thick walls. The only difference is, collenchyma cells have irregularly thickened walls, while sclerenchyma cells have heavily thickened walls. Hence, option B is incorrect. 
    Collenchyma and sclerenchyma both cells have lumen in their cells. Therefore, option C is incorrect. 
    Collenchyma and sclerenchyma cells both are permanent types of cells. This means they have lost their ability to divide i.e., they are not meristematic. Therefore, option D is incorrect.
    Collenchyma cells show the presence of cytoplasm at maturity. But sclerenchyma cells do not have cytoplasm in their cells at maturity. Therefore, option A is correct.  
  • Question 6
    1 / -0
    Collenchyma is a
    Solution
    Collenchyma is a living tissue composed of more or less elongated cells with thick primary non-lignified walls. Being living the cells can store food and take part in photosynthesis.
  • Question 7
    1 / -0
    Vascular bundles with phloem on either side of the cambium are ______________.
    Solution

    Bicollateral vascular bundles contain two patches of phloem on either side of the xylem on the same radius. The outer phloem or external phloem remains towards the periphery of the central cylinder and inner or internal phloem remains towards the centre. If the cambium is present in between xylem and phloem, it is called as bicollateral open. 

    So, the correct option is ‘Bicollateral’ i.e. B.

  • Question 8
    1 / -0
    Gaseous exchange between air and internal tissues of old corky stem takes place through
    Solution
    Lenticel is a pore in the stem of a woody plant, showing a raised spot that may be filled with a powdery substance. The pore permits air to reach tissue below the surface. Stomata are present in leaves, Sieve plates are present in phloem tissue for the transport of carbohydrates and Pits are the characteristic depressions on the cell walls for the transport of water and minerals.
  • Question 9
    1 / -0
    Vascular bundles are arranged in a ring in stem of
    Solution
    Gram is a dicot, in which the vascular bundles are arranged in the form of a ring. Dicots have 2-8 vascular bundles which are arranged radially and in a ring-like fashion. 
    So, the correct answer is 'Gram'.
  • Question 10
    1 / -0
    Cambium found in vascular bundles of dicot stem is _______________.
    Solution
    Fascicular cambium is present in vascular bundles of dicot stem.  It is present between xylem and phloem of vascular bundle. 
    So, the correct answer is 'Fasicular cambium'
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