Which of the following is absent in most of the monocotyledons?

Options

A. a) Pholem parenchyma
B. b) Tracheids
C. c) Vessels
D. d) Xylem parenchyma

Answer

To solve the question "Which of the following is absent in most of the monocotyledons?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which structure is typically absent in most monocotyledons. Monocotyledons, or monocots, are a group of flowering plants that have one cotyledon in their seeds.

2. **Review the Options**: The options provided are:
- A) Phloem parenchyma
- B) Tracheids
- C) Vessels
- D) Xylem parenchyma

3. **Analyze Each Option**:
- **Option A: Phloem Parenchyma**: This is a type of cell in the phloem tissue that is involved in the storage of food and other substances. It is noted that phloem parenchyma is absent in most monocots.
- **Option B: Tracheids**: These are long, narrow cells in the xylem that help in water conduction. Tracheids are present in monocots.
- **Option C: Vessels**: Vessels are also part of the xylem and are typically present in monocots, aiding in efficient water transport.
- **Option D: Xylem Parenchyma**: This type of parenchyma is involved in storage and is generally present in monocots.

4. **Identify the Correct Answer**: Based on the analysis, phloem parenchyma is the structure that is absent in most monocotyledons. Therefore, the correct answer is **Option A: Phloem Parenchyma**.

5. **Conclude**: The answer to the question is that phloem parenchyma is absent in most monocotyledons.

### Final Answer:
**Option A: Phloem Parenchyma**

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