Hint: Roots are the descending part of a plant. Roots originate from the radicle which is the first structure that originates from the seed. Roots are normally non-green. Moreover, the distinguishing feature of the roots is that they have no nodes and internodes present.
Complete answer: The prop root is a modification of adventitious roots. Adventitious roots are those roots that develop from other parts of the plant other than the radicle. Usually, adventitious roots develop from the stem and leaves. They are also known as the modified roots because they are modified to perform special functions. The prop root provides additional support to the plants because they have very strong roots. Two examples of plants with prop roots are as follows:
a) Banyan tree – It is also known as Ficus Bengalensis. In the banyan trees, prop roots originate from the branches of the trees and reach down the ground. These roots are hygroscopic in nature. They absorb the moisture from the environment.
b) Mangroves – In Mangroves, prop roots are present. These roots originate from the branches. They have pores that help them in the intake of oxygen.
Note: There are three kinds of root systems in plants. These three types of root systems are:
a) Taproot – It is the primary root. When the root originates directly from the radicle, it is known as the taproot system. Various secondary and tertiary roots originate from the primary root.
b) Fibrous root – It is a modified tap root. Here, the radicle degenerates in the initial stage and later thread-like roots develop from the base of the stem.