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Growth rings occurs in :...

Growth rings occurs in :

A

Extrastelar region

B

Stelar region

C

Periderm

D

Both stelar and extrastelar regions

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Growth Rings**: Growth rings, also known as annual rings, are layers of wood produced during a single growth period. Each ring typically represents one year of growth. 2. **Identifying the Source of Growth Rings**: Growth rings are formed due to the activity of the cambium layer, specifically the cork cambium, which adds new layers of wood (xylem) each year. 3. **Analyzing the Options**: - **Extra Stellar Region**: This region is where growth rings are formed, as it is responsible for the addition of new wood. - **Stellar Region**: This region is associated with the central part of the root or stem, where tissues are formed due to procambium activity. It does not contribute to the formation of growth rings. - **Periderm**: This is the outer protective layer of the stem and does not play a role in the formation of growth rings. - **Both Stellar and Extra Stellar Regions**: Since the stellar region does not contribute to growth rings, this option is incorrect. 4. **Conclusion**: Based on the analysis, growth rings occur in the extra stellar region. **Final Answer**: Growth rings occur in the extra stellar region. ---
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