Q.Mesophyll tissue is present in................

The dorsiventral leaf, typical of dicots, is held roughly horizontally so its darker, sun-facing upper surface and paler, shaded lower surface differ structurally to match. The upper epidermis is a single compact, cuticle-covered layer with almost no stomata; below it, the mesophyll is clearly split into two layers — an upper palisade parenchyma of closely packed, upright, chloroplast-rich cells specialised for capturing strong overhead light and carrying out most of the leaf's photosynthesis, and a lower spongy parenchyma of loosely arranged, irregular cells with large intercellular air spaces, specialised for gas exchange with the atmosphere via the numerous stomata of the lower epidermis (each opening into a sub-stomatal air chamber). Va …