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Anatomy of Flowering Plants Test - 60

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Anatomy of Flowering Plants Test - 60
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  • Question 1
    1 / -0
    Which of these types of cells is most likely to divide?
    Solution
    Meristem cells are most likely to divide as it has the capability to divide but others do not have the capability to divide. Meristem cells are located in a specific region where the growth of the plant occurs. So, the correct answer is option "meristem".
  • Question 2
    1 / -0
    Between the bark and the wood in a woody stem, there is a layer of meristem called:
    Solution
    Cambium is a kind of meristem which is most active in woody plants and it lies between the bark and wood of the stem. The vascular cambium forms tissues that carry water and nutrients throughout the plant. On the outer surface, the vascular cambium forms new layers of phloem, and on the inner surface, new layers of xylem. The cork cambium creates cells that eventually become bark on the outside and cells that add to the cortex on the inside. In woody plants, the cork cambium is part of the periderm. So, the correct answer is "both vascular and cork cambium".
  • Question 3
    1 / -0
    Choose the correct answer from the alternatives given.
    Meristematic activity is seen maximum in the:
    Solution
    Meristematic activity is seen the maximum in the shoot of a plant. The meristematic tissue contains undifferentiated cells found in the zone of the plant where growth can take place.
    So, the correct answer is 'shoot'.

  • Question 4
    1 / -0
    The term meristem was given by:
    Solution
    The term meristem was first used in 1858 by Carl Wilhelm von Nägeli in his book Beiträge zur Wissenschaftlichen Botanik. So, the correct answer is " C. Nageli".
  • Question 5
    1 / -0
    Vascular bundles in a dicot leaf are
    Solution

    • Vascular bundles are present within the mesophyll tissue. They represent the midrib and veins of a leaf. Each vascular bundle consists of xylem and phloem complex tissues surrounded by bundle sheath. 
    • In a dicot leaf, as xylem and phloem are present on the same radius, the vascular bundle is described as conjoint and collateral. The vascular bundle is described as closed as there is no cambium present between xylem and phloem. 
    • Vascular bundles help in the transport of water, minerals, and food in the leaf. Vascular bundles also provide strength to the leaf.

  • Question 6
    1 / -0
    Which is not a feature of meristematic tissue?
    Solution
    Meristematic tissues are the undifferentiated cells that are found in the growth zones. It gives rise to various organs. They have plastids that are not differentiated and present in the form of proplastid. The cell wall of the meristematic cell is made up of cellulose, the cell wall is thin and flexible while the secondary wall is absent. Cells lack intercellular spaces and also lack reserve food as it is highly active and does not require any reserve food for energy.
    So. the correct option is 'Absence of reserve food'.
  • Question 7
    1 / -0
    Water containing Lysigenous cavity is present within the vascular bundles.
    Solution
    The vascular bundle showing protoxylem vessels and parenchyma cell which dissolve leading to the formation of water cavity called lysigenous cavity such vascular bundles are found in monocot stem .
    So the correct answer is A .
  • Question 8
    1 / -0
    Stele is made up of (in dicot root) :- 
    Solution
    In this arrangement, the primary vascular tissue consists of vascular bundles, usually in one or two rings around the pith. In addition to being found in stems, the eustele appears in the roots of monocot and dicotyledonous flowering plants. The vascular bundles in a eustele can be collateral (with the phloem on only one side of the xylem) or bicollateral (with phloem on both sides of the xylem, as in some Solanaceae).

    So, the correct option is 'Vascular bundle'.
  • Question 9
    1 / -0
    The axillary bud is constituted by the cells 'left behind' from
    Solution
    As the apical meristem grows and forms leaves, it leaves behind a region of meristematic cells at the node between the stem and the leaf. These axillary buds are usually dormant, inhibited by auxin produced by the apical meristem, which is called apical dominance.
    So, the correct option is 'shoot apical meristem'.
  • Question 10
    1 / -0
    The stele found in monocot is:
    Solution
    The stele is the central part of the root and stem which contains tissues derived from the procambium, in monocots, the vascular bundles are scattered and the stele is an atactostele.
    So, the correct option is 'Atactostele'.
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