As comprared to spring wood, automn wood has

Options

A. more number of xylary elements with wider vessels
B. more number of xylary elements with narrow vessels
C. fewer cylary elements with wider vessels
D. fewer xylary elements with narrow vessel.

Explanation

To answer the question "As compared to spring wood, autumn wood has", we need to understand the differences between spring wood and autumn wood in terms of their structure and characteristics. Here’s a step-by-step solution:

### Step 1: Understand the Formation of Wood
- Wood is formed through secondary growth in plants, primarily in the xylem. This growth occurs in rings due to the activity of the cambium layer.

**Hint:** Remember that wood growth is influenced by seasonal changes, leading to the formation of distinct rings.

### Step 2: Identify Spring Wood Characteristics
- Spring wood, also known as early wood, is formed during the spring season when the cambium is highly active.
- It produces a larger number of xylem vessels with wider cavities to facilitate efficient water transport during the growing season.

**Hint:** Think about the conditions in spring that promote rapid growth and larger vessel formation.

### Step 3: Identify Autumn Wood Characteristics
- Autumn wood, also referred to as late wood, is formed during the autumn season when cambial activity decreases.
- This results in fewer xylem vessels that are narrower in diameter compared to those in spring wood.

**Hint:** Consider the transition from the active growth of spring to the slower growth in autumn.

### Step 4: Compare Spring Wood and Autumn Wood
- In summary, spring wood has more xylem elements with wider vessels, while autumn wood has fewer xylem elements with narrower vessels.

**Hint:** Focus on the number and size of xylem vessels when comparing the two types of wood.

### Step 5: Choose the Correct Option
- Based on the comparison, the correct answer to the question is: "fewer xylery elements with narrow vessels."

**Final Answer:** Autumn wood has fewer xylery elements with narrow vessels compared to spring wood.