The mode of arrangement of leaves on the stem and the branch is known as: (NSCL 2018)

✅Explanation: Phyllotaxy refers to the arrangement of leaves on a stem or branch. It determines how leaves are positioned to maximize light capture and minimize self-shading.

📌Other Options Explanations:
-Vernalization: The process of inducing flowering in plants by exposure to cold temperatures.
-Vernation: The arrangement of leaves within a bud.
-Venation: The pattern of veins in a leaf.

🔑Key Points:
-Phyllotaxy refers to the pattern or arrangement of leaves on a plant's stem or branch.
-The arrangement of leaves on the stem of a plant is phyllotaxy. A structure similar to a leaf is a leaflet.
-Compound leaves come together to form several leaflets.
-Stipules are leaf-like structures found at the base of the stalk.
-The simple arrangement of leaves on a stem is opposite and alternating (also called a spiral).
-If multiple leaves are visible or appear to be, the leaves may also be rooted from the same point on the stem (at the same node).

🔴 🔴Additional information::
-Phyllotaxy is of three types-
-Opposite – In opposite leaf arrangement, each node has a pair of leaves opposite each other.
-Alternate – In an alternate leaf arrangement, there is one leaf per plant node.
-Whorled – In whorled leaf arrangement, a node has more than two leaves in the form of a whorl.