pick up the correct statement

Options

A. spring wood is otherwise called late wood
B. autumn wood is otherwise called early wood
C. in old trees, the heart wood is involved in conduction of water
D. cambial cells present between primary xylem and primary pholem constitute the intrafascicular cambium.

Answer

To solve the question "Pick up the correct statement," we will analyze each option provided and determine which one is correct based on the information given in the video transcript.

### Step-by-Step Solution:

1. **Understanding Spring Wood and Autumn Wood:**
- Spring wood, also known as early wood, is formed during favorable conditions (spring). It has a lower density, wider cavities, and more xylary elements, making it lighter.
- Autumn wood, also known as late wood, is formed during unfavorable conditions (end of the growing season). It has a higher density, narrower cavities, and fewer xylary elements, making it darker and heavier.

**Hint:** Remember the differences in characteristics between spring wood and autumn wood.

2. **Evaluating the Options:**
- **Option 1:** "Spring wood is also called as late wood."
- This is incorrect because spring wood is early wood, not late wood.

- **Option 2:** "Autumn wood is also called as early wood."
- This is also incorrect because autumn wood is late wood, not early wood.

- **Option 3:** "In old trees, hardwood is helping in the conduction of water."
- This is incorrect because heartwood (which is part of hardwood) consists of dead cells that do not conduct water; they provide support instead.

- **Option 4:** "The cambium cells present between primary xylem and primary phloem will constitute the intrafascicular cambium."
- This statement is correct. The intrafascicular cambium is indeed located between the primary xylem and primary phloem in open vascular bundles, particularly in dicots.

**Hint:** Analyze each statement carefully to see if it aligns with the definitions and characteristics discussed.

3. **Conclusion:**
- After evaluating all the options, we find that **Option 4** is the correct statement.

### Final Answer:
**The correct statement is Option 4: The cambium cells present between primary xylem and primary phloem will constitute the intrafascicular cambium.**