Cells are less lignified in

Options

A. Xylem tracheids
B. Phloem fibres
C. Xylem vessels
D. Hard fibers

Answer

To solve the question "Cells are less lignified in," we need to analyze the options provided and understand the role of lignin in different plant tissues. Here’s a step-by-step breakdown of the solution:

### Step 1: Understanding Lignification
Lignification refers to the process where lignin is deposited in the cell walls of plants, providing rigidity and strength. It is particularly important in certain plant tissues that need to withstand pressure and provide structural support.

**Hint:** Lignin is a complex organic polymer that strengthens cell walls in many plants.

### Step 2: Analyzing the Options
The options given are:
1. Xylem tracheids
2. Phloem fibers
3. Xylem vessels
4. Hard fibers

We need to determine which of these options has cells that are less lignified.

**Hint:** Consider the function of each type of tissue and how lignin contributes to that function.

### Step 3: Evaluating Xylem Tissues
Xylem tissues, including tracheids and vessels, are primarily responsible for the transport of water and minerals. They are heavily lignified to withstand the negative pressure created during water transport.

**Hint:** Xylem is known for its high lignin content to support water transport.

### Step 4: Evaluating Phloem Fibers
Phloem fibers are part of the phloem tissue, which is responsible for the transport of sugars and nutrients. Compared to xylem, phloem fibers are less lignified because they do not need to withstand the same pressure as xylem.

**Hint:** Phloem primarily transports sugars, which do not require high lignification.

### Step 5: Evaluating Hard Fibers
Hard fibers, such as those found in certain plants (e.g., jute, hemp), are also lignified to provide strength and support. Therefore, they are not the correct answer.

**Hint:** Hard fibers are typically used for their strength and durability.

### Step 6: Conclusion
Based on the analysis, the cells that are less lignified are found in the phloem fibers. Thus, the correct answer to the question is:

**Answer:** Phloem fibers

### Summary of Steps:
1. Understand what lignification is.
2. Analyze the options provided.
3. Evaluate the lignin content in xylem tissues.
4. Assess the lignin content in phloem fibers.
5. Consider the lignin content in hard fibers.
6. Conclude that phloem fibers have less lignification.