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EAMCET Medical EAMCET Medical Solved Paper-2009

  • question_answer
    The number of stomata and epidermal cells in 1 mm2 leaf area of lower epidermis of the leaves of X, Y and Z plants are given below. Arrange the plants in decreasing order of their stomatal index
    Plant Number of Stomata Number of  Epidermal Cells
    X 30 150
    Y 60 240
    Z 90 400
          The correct answer is

    A)  X,Y,Z                                    

    B)  Y,Z,X

    C)   Z,Y,X                                   

    D)  Y,X,Z

    Correct Answer: B

    Solution :

                     Stomatal index (SI) = \[\frac{S}{S+E}\times 100\]
    Plant Number of stomata (S) No. of epidermal Cells (E) SI
    X 30 150 16.6
    Y 60 240 20.0
    Z 90 400 18.3
    So, the arrangement of plants in decreasing order of their stomatal index is, Y,Z,X.


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