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In olds trees, part of secondary xylem t...

In olds trees, part of secondary xylem that conduct `H_(2) O` and minerals is called

A

heart wood

B

sap wood

C

late wood

D

early wood

Text Solution

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The correct Answer is:
To answer the question regarding the part of the secondary xylem that conducts water and minerals in old trees, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Secondary Xylem**: - Secondary xylem is produced by the vascular cambium and is responsible for the conduction of water and minerals in plants. It consists of two main regions: heartwood and sapwood. 2. **Identifying Heartwood and Sapwood**: - **Heartwood**: This is the inner part of the secondary xylem, which is often darker due to the accumulation of organic compounds such as tannins and resins. It is composed of dead cells and is non-conductive. - **Sapwood**: This is the outer, lighter-colored part of the secondary xylem. It is composed of living cells that are responsible for the conduction of water and minerals. 3. **Analyzing the Options**: - **Hardwood**: This term usually refers to heartwood, which does not conduct water and minerals. - **Sapwood**: This is the correct answer as it is the part of the secondary xylem that actively conducts water and minerals. - **Late Wood**: This refers to the denser wood formed later in the growing season and is not specifically responsible for conduction. - **Early Wood**: This is formed in the spring and is less dense, but it is not the main conducting tissue in older trees. 4. **Conclusion**: - Based on the definitions and functions of heartwood and sapwood, the part of the secondary xylem that conducts water and minerals in old trees is **sapwood**. ### Final Answer: The part of the secondary xylem that conducts water and minerals in old trees is called **sapwood**. ---
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