Which of the following is called early wood?

Options

A. Spring wood
B. Autumn wood
C. Primary xylem
D. Secondary pholem

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks for the term that is synonymous with "early wood." In botany, "early wood" refers to a specific type of wood produced during a particular season.

2. **Identifying the Options**: The options provided are:
- A) Spring wood
- B) Autumn wood
- C) Primary xylem
- D) Secondary phloem

3. **Analyzing Each Option**:
- **Option A: Spring wood** - This is known as early wood. It is produced during the rapid growth phase in the spring season when the cambium is very active, leading to the formation of larger cells with thinner walls.
- **Option B: Autumn wood** - This is known as late wood. It is produced later in the growing season when growth slows down, resulting in denser wood.
- **Option C: Primary xylem** - This refers to the first formed xylem, also known as protoxylem, and is not synonymous with early wood.
- **Option D: Secondary phloem** - This is the later form of phloem and is not related to early wood.

4. **Conclusion**: Based on the analysis, the correct answer is **A) Spring wood**, as it is the term that is synonymous with early wood.