Q.Distinguish between Dicot and Monocot leaf on the basis of following characters. Characters: Stomata, Intercellular space, Venation, Vascular bundle, Mesophyll cells.

Step 1. Stomata. In a dorsiventral dicot leaf, stomata are concentrated on the lower (abaxial) epidermis, since the shaded lower surface is where most water-vapour and gas exchange is directed; the upper (adaxial) epidermis has few or none. In an isobilateral monocot leaf, both surfaces are similarly exposed to light, so stomata occur on both epidermal layers — it is amphistomatic.

Step 2. Intercellular space. The dicot leaf's spongy parenchyma is specifically loosely arranged to create large, well-defined air spaces connecting to the stomata below it. The monocot leaf's uniform chlorenchyma also has intercellular spaces for gas exchange, but they are more evenly distributed through the tissue rather than concentrated in a distinct spongy zone.

Step 3. Venation. Dicot leaves show reticulate (net-like) venation, with veins branching and re-joining across the blade. Monocot leaves show parallel venation, with veins running side by side along the length of the leaf. …

Fill each row of the comparison table using the established dorsiventral (dicot) vs …

• Leaving the 'intercellular space' row too vague — both leaf types have some air spaces; the real distinction is whether they are organised into a distinct spongy layer (dicot) or spread more uniform …