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In breathing roots( pneumatophores) of m...

In breathing roots( pneumatophores) of man grove plants, the xylem is

A

exarch protoxylem

B

measarch

C

endarch protoxylem

D

none of these

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The correct Answer is:
To answer the question regarding the xylem in the breathing roots (pneumatophores) of mangrove plants, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Structure of Xylem**: - Xylem is a type of vascular tissue responsible for the transport of water and nutrients in plants. It consists of different components, including tracheids and vessel elements. 2. **Identify the Types of Xylem**: - There are two main arrangements of xylem: - **Endarch**: In this arrangement, the protoxylem (the first xylem to develop) is located towards the inside, and the metaxylem (the later-formed xylem) is on the outside. This is typically found in monocots. - **Exarch**: In this arrangement, the protoxylem is located towards the outside, and the metaxylem is towards the inside. This is commonly found in dicots. 3. **Relate to Mangrove Plants**: - Mangrove plants often have specialized roots known as pneumatophores that help them breathe in waterlogged environments. 4. **Determine the Type of Xylem in Pneumatophores**: - Since pneumatophores are primarily found in monocots, they exhibit the endarch arrangement of xylem. 5. **Conclusion**: - Therefore, in the breathing roots (pneumatophores) of mangrove plants, the xylem is **endarch**. ### Final Answer: In breathing roots (pneumatophores) of mangrove plants, the xylem is **endarch**. ---
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