Question

__________ is an example of pinnate type venation of leaf blade.

• A. Mexican aster($Cosmos$)
• B. Grape
• C. Pumpkin
• D. Sunflower

Answer 1

The correct option is A Mexican aster($Cosmos$)

Venation is the arrangement of veins on the leaves. It is basically of 2 types, pinnate and palmate. In pinnate or unicostate venation, the lamina has a single principal vein or midrib. It produces lateral veins. In palmate or multicostate venation, lamina has more than one principal vein. Castor has palmate type venation of leaf blade. Cosmos is an example of pinnate type venation of leaf blade. Thus, the correct answer is 'Cosmos.'