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A condition where the protoxylem lies to...

A condition where the protoxylem lies towards periphery and metaxylem lies towards the centre is

A

Exarch

B

Endarch

C

Mesarch

D

Diarch

Text Solution

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The correct Answer is:
To solve the question regarding the arrangement of protoxylem and metaxylem, we can follow these steps: ### Step 1: Understand the Definitions - **Protoxylem**: The first formed xylem, which is responsible for the early transport of water and minerals. - **Metaxylem**: The later formed xylem, which develops after protoxylem and is responsible for the bulk transport of water. ### Step 2: Analyze the Options 1. **Exarge**: In this condition, the protoxylem is located towards the periphery (outer side) and the metaxylem is located towards the center. 2. **Endarge**: Here, the protoxylem is located towards the center and the metaxylem is towards the periphery. 3. **Mesarge**: In this condition, the protoxylem develops first in the center and then expands both outward and inward. 4. **Diarch**: This condition has the protoxylem on the outside of the metaxylem. ### Step 3: Match the Conditions The question specifically asks for a condition where the protoxylem lies towards the periphery and the metaxylem lies towards the center. - **Exarge** matches this description perfectly. ### Step 4: Eliminate Incorrect Options - **Endarge** is incorrect because it has the protoxylem in the center. - **Mesarge** is incorrect because it describes a different arrangement. - **Diarch** is also incorrect as it places the protoxylem outside of the metaxylem. ### Conclusion The correct answer to the question is **Exarge**.
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