The Casparian strips of the root endodermis contain a mixture of:

The cell wall of which of the following is thickened with suberin?

Given below are two statements:
Statement $I:$ Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement $II:$ Exarch condition is the most common feature of the root system.
In the light of the above statements,choose the correct answer from the options given below:

Where are the Casparian strips found?

How many xylem bundles are found in the internal structure of a sunflower root?

Centripetal xylem is the characteristic of