Question

The point where the leaves grow on branch is called
A. Node
B. Stem
C. Bud
D. Root nodule

Answer 1

Hint: Leaves are the flat green part of plants arising from the stem. They are mainly responsible for serving as the main site for the process of photosynthesis in plants. Sometimes, leaves get modified to perform other special functions like storage, protection, substrate attachment, and trapping.

Complete answer:
Plant’s stems, whether aerial or underground, are characterized by the presence of specialized structures known as nodes and internodes. The part of the stem from which leaves arise is known as nodes. And the space between two consecutive nodes is known as internode.
Typically, a leaf consists of two parts namely lamina and petiole. Lamina is the broad green sheet-like part of the leaf. Whereas the petiole is the small stalk-like structure by which the leaf remains attached to the stem. The lamina of the leaf shows patterns or networks of thin line-like structures. These are known as a vein, and this helps in the conduction of nutrients and water throughout the plant. This venation can often be used to identify the type of plant.
The monocotyledonous plants usually show parallel venation. Whereas dicotyledonous plants shoe reticulate venation. Depending upon their structure leaves can be broadly classified as simple leaves and compound leaves. When only a single blade is attached to a petiole the leaf is said to be a simple leaf. If more than one blade is attached to a single petiole it is known as compound leaves.

Therefore, it is the node from where leaves arise from a branch part of the stem.

Note:
The arrangement of leaves on the stem is known as phyllotaxy. Leaves can be either arranged opposite or alternatively on the stem. These are the main sites for processes such as photosynthesis, transpiration and respiration (gaseous exchange).