Tracheids of angiosperms are recognised by the presence of

Options

A. Scalaiform perforation plates
B. Scalaifrom thickening
C. Bordered pits
D. None of the above

Explanation

To solve the question regarding the recognition of tracheids in angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Tracheids**:
- Tracheids are specialized cells found in the xylem of vascular plants. They are responsible for the transport of water and minerals from the roots to other parts of the plant.

2. **Characteristics of Tracheids**:
- Tracheids are dead cells without protoplasts (the living part of the cell). They are considered the most primitive type of water-conducting cells.

3. **Presence in Vascular Plants**:
- Tracheids are found in all categories of vascular plants, including pteridophytes, gymnosperms, and angiosperms.

4. **Identifying Features of Angiosperm Tracheids**:
- The question specifically asks about the tracheids of angiosperms. In angiosperms, tracheids are recognized by the presence of simple pits.

5. **Analyzing the Options**:
- The options provided are:
- A) Scleriform perforation plates
- B) Scleriform thickening
- C) Bordered pits
- D) None of the above
- Scleriform perforation plates and scleriform thickening are absent in angiosperm tracheids. Bordered pits are also not characteristic of angiosperm tracheids.

6. **Conclusion**:
- Since none of the options correctly describe the recognition features of angiosperm tracheids, the correct answer is **D) None of the above**.