BHU PMT BHU PMT (Mains) Solved Paper-2008

  • question_answer
    What differentiates leaf of dicots from monocots?

    A)  Parallel venation

    B)  Differentiation of palisade and spongy parenchyma

    C)  Stomata only on upper side

    D)  Stomata both on upper and lower sides

    Correct Answer: B

    Solution :

                 Main differences between dicot and monocot leaves are as follows
    Character Dicot leaf Monocot leaf
    Types of leaf Dorsiventral Isobilateral
    Stomata Usually more on lower epidermis Equal on lower and upper epidermis
    Mesophyll Differentiated in to palisade and spongy parenchyma Undifferentiated into spongy and palisade parenchyma
    Bundle  sheath Made up of parenchyma. Just above and below the vascular bundles. Some parenchymatous cells or collenchymatous cells are present upto epidermis. Made up of a parenchyma but Just above and below the vascular bundles are found sclerenchymatous cells
    Bulliform cells Abesnt Present, these cells help in rolling and unrolling of leaves.
    Venation Reticulate Parallel


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