Question

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:

• A. Both Statement I and Statement II are false.
• B. Statement I is correct but Statement II is false.
• C. Statement I is incorrect but Statement II is true.
• D. Both Statement I and Statement II are true.

Answer 1

The Correct Option is C

To determine the correct answer, let's analyze both statements based on our understanding of plant anatomy.

1. Statement I: Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
   • The terms endarch and exarch refer to the development of xylem but primarily concern primary xylem and not secondary xylem.
   • In an endarch condition, the protoxylem is towards the center (medulla) and metaxylem towards the periphery. It is typical in stems.
   • In an exarch condition, the protoxylem is towards the periphery and metaxylem towards the center. This is common in roots.
   • Since the statement incorrectly associates these terms with secondary xylem, Statement I is incorrect.
2. Statement II: Exarch condition is the most common feature of the root system.
   • This statement accurately reflects plant anatomy. Roots typically exhibit an exarch arrangement of primary xylem with the protoxylem located towards the periphery.
   • Therefore, Statement II is correct.

Based on the above analysis, the correct answer is: Statement I is incorrect but Statement II is true.