In temperate regions, during spring season, cambium is very active and produces a large number of xylary elements having vessel with wider cavities wood formed in this way is called as

Options

A. spring wood
B. autumn wood
C. early wood
D. both a and c

Answer

To answer the question regarding the type of wood formed in temperate regions during the spring season when cambium is very active and produces a large number of xylary elements with wider cavities, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Cambium**: Cambium is a layer of actively dividing cells in plants that contributes to secondary growth. It is responsible for producing new xylem (wood) and phloem (bark).

2. **Identify Seasonal Activity**: Cambium activity varies with seasons. In temperate regions, it is more active during the spring and less active during the winter.

3. **Formation of Xylem**: During the spring, the active cambium produces a large quantity of xylem. This xylem is characterized by vessels that have wider cavities compared to those formed during other seasons.

4. **Distinguish Between Types of Wood**: The wood formed during the active spring season is referred to as "early wood" or "spring wood." In contrast, the wood formed during the less active winter season is called "late wood" or "autumn wood," which has narrower vessels.

5. **Conclusion**: Therefore, the wood formed in the spring season with wider cavities is called "early wood."

### Final Answer:
The wood formed in temperate regions during the spring season, characterized by a large number of xylary elements with wider cavities, is known as **early wood**.

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