In an annual ring, the light coloured part is known as

Options

A. Early wood
B. Late wood
C. Heartwood
D. Sapwood

Answer

**Step-by-Step Solution:**

1. **Understanding Annual Rings**: Annual rings in trees are formed due to the growth of xylem produced by the cambium layer. Each year, a new layer of xylem is added, which can be distinguished based on the season of growth.

2. **Identifying the Components of Annual Rings**: Each annual ring consists of two parts:
- The lighter part formed during the spring (early part of the growing season).
- The darker part formed during the summer and fall (late part of the growing season).

3. **Characteristics of Early Wood**: The light-colored part of the annual ring is known as "early wood" or "spring wood". This wood is produced when the cambium is highly active during the spring season, leading to the formation of larger xylem vessels with wider cavities.

4. **Characteristics of Late Wood**: In contrast, the darker part of the annual ring is known as "late wood" or "winter wood". This wood is produced when the cambium is less active during the winter season, resulting in narrower vessels that are more densely packed.

5. **Conclusion**: Therefore, the light-colored part of an annual ring is referred to as "early wood".

**Final Answer**: The light colored part of an annual ring is known as "early wood".

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