Nodulated roots occur in

Given below are two statements.
Statement-$I$: In root hair,the outer layer of the cell wall is composed of pectin.
Statement-$II$: In root hair,the inner layer of the cell wall is composed of cellulose.
Choose the correct answer from the options given below with reference to the structure of root hair.

Prop or pillar roots are

The $Orobanche$ plant is:

Describe the modifications of roots for specific functions.

Which of the following is not the main function of the root system?