Question

What is leaf venation?

Answer 1

Hint: The arrangement of leaf on a stem is generally known as phyllotaxy. There are also some arrangements based on the different parts of a plant.

Complete answer:
 Venation is the arrangement of veins in the blade of a leaf. The veins are composed of vascular tissues which are vital for the transport of food and water. Leaf veins connect the blade to the petiole, and lead as of the petiole to the stem. The two main vascular tissues in leaf veins are xylem, which is important for transport of water and soluble ions into the leaf, and phloem which is vital for transport of carbohydrates made by photosynthesis from the leaf to the rest of the plant.

The venation pattern of a leaf is categorized into reticulated, parallel, or dichotomous. In reticulate venation the veins are arranged in a net like form, in which they are all interconnected similar to the strands of a net. Reticulate venation is the most known venation pattern and it occurs in the leaves of nearly all dicotyledonous Angiosperms. In parallel type of venation the veins are smaller in size and parallel or they are nearly parallel to one another. Even if a series of smaller veins connects the large veins. Parallel venation is mainly seen in the leaves of nearly all monocotyledonous Angiosperms
In dichotomous types of venation the veins branch off from each other like the branches of a tree. This is the rarest venation pattern and it occurs in the leaves of some ferns and in the gymnosperm tree.
Venation geometry influences mechanical stability.
So we can conclude that the phenomena of arrangement of veins of the lamina of the leaf surface is called venation

Hence, the correct answer is option ()

Note: The main function of venation is to transport water and carbohydrates. Leaf veins connect the blade to the petiole and also the leaf from the petiole to the stem.