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Anatomy of Flowering Plants Test - 74

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Anatomy of Flowering Plants Test - 74
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Weekly Quiz Competition
  • Question 1
    1 / -0
    In dicot stem, cork cambium is formed by dedifferentiation of
  • Question 2
    1 / -0
    Find out incorrect sentence
    Solution
    Meristematic tissues are not permanent tissues as permanent tissues do not divide after differentiation. Examples, of permanent tissue collenchyma, parenchyma, xylem, phloem etc
    Apical and intercalary meristems are primary meristems responsible for vertical growth of the plant.
    So, the incorrect statement is 'Apical and intercalary meristems are permanent tissues'

  • Question 3
    1 / -0
    A conjoint and open vascular bundle will be observed in the transverse section of-
    Solution
    $$\textbf{Correct option:}$$ (D)

    $$\textbf{Explanation for correct option:}$$

    $$\bullet$$ Vascular bundle in which xylem and phloem lie on the same radii in such a position that xylem lies inwards and phloem outwards is called Conjoint and collateral vascular bundle.

    $$\bullet$$ When it possess a strip of cambium between xylem and phloem then it is of open type. Such vascular bundles because of the presence of cambium has the ability to form secondary xylem and phloem tissues.

    $$\bullet$$ Conjoint, collateral and open vascular bundles are the characteristic of dicot stem.

    $$\bullet$$ Hence the correct option is (D)

  • Question 4
    1 / -0
    Parenchyma containing chloroplasts is known as:
    Solution
    Chlorenchyma are chlorophyllous parenchyma cells, that help in photosynthesis.
    So, the correct answer is ' Chlorenchyma'

  • Question 5
    1 / -0
    Which of the following cells in plants are said to be non living?
    Solution
    Cells of tissue Sclerenchyma consist of dead cells. The cell wall is made of lignin.
    so, the correct answer is 'Sclerenchyma'
  • Question 6
    1 / -0
    Intrastelar ground tissue includes:
    Solution
    Stele is demarcated from the cortex by the endodermis. The stele thus comprises of the pericycle, the rays separating the vascular bundles called the medullary rays and the central pith. All these cells are parenchymatous and tend to fill in the spaces between the vascular bundles, the central region of the stem or the root and the space between the vascular bundle and the pericycle. Hence, called the ground tissue.
    So, the correct answer is 'Pericycle, medullary rays and pith'
  • Question 7
    1 / -0
    Identify the incorrect statement.
    Solution
    The peripheral region of the secondary xylem is lighter in colour. This is termed as sapwood. In the trunk and older branches of large trees, only the outer secondary xylem which is sapwood serves in water conduction, while the inner part which is heartwood is composed of dead but structurally strong xylem.
    Thus, the correct answer is (B).
  • Question 8
    1 / -0
    The transverse section of a plant shows following anatomical features:
    (a) Large number of scattered vascular bundles surrounded by bundle sheath
    (b) Large conspicuous parenchymatous ground tissue
    (c) Vascular bundles conjoint and closed
    (d) Phloem parenchyma absent
    Identify the category of plant and its part :
    Solution
    Closed vascular bundles are scattered and surrounded by bundle sheath embedded in large parenchymatous ground tissue is characteristic of monocot stem. The vascular bundles are open, conjoint, and arranged in a ring with inconspicuous pith in the dicot stem. In roots, the vascular tissues are arranged radially.
    So, the correct answer is 'Monocotyledonous stem'
  • Question 9
    1 / -0
    If we take the growing roots of an onion and cut out its tips, the roots will no longer grow, because we have cut out the:
    Solution
    D. Apical meristem
    Solution : Growing roots of an onion has apical meristem which are the growing regions of the plants. This if cut stops the growth of the plants in that region.
    So the correct answer is " Apical meristem". 
  • Question 10
    1 / -0
    The cambium located in between xylem and phloem in dicot stem is
    Solution
    The cambium located in between xylem and phloem in dicot stem is intrafascicular. Itrafascicular cambium is primary meristem that develops from the procambium of the stem apex. It is located inside the open vascular bundles, between phloem and xylem patches. During secondary growth, the derivatives are only secondary phloem and secondary xylem.
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