In which of the following xylem lacks vessels?

Options

A. Cycas
B. Mango
C. Neem
D. Teak

Explanation

To solve the question "In which of the following xylem lacks vessels?" we need to analyze the options given and understand the characteristics of xylem in different plant groups.

### Step-by-Step Solution:

1. **Understand Xylem Composition**:
- Xylem is a type of tissue in vascular plants responsible for the transport of water and minerals. It consists of two main components: tracheids and vessels.
- Tracheids are present in all vascular plants, while vessels are primarily found in angiosperms (flowering plants).

2. **Identify the Plant Groups**:
- The options provided are: Cycus, Mango, Neem, and Teak.
- Cycus is a gymnosperm, while Mango, Neem, and Teak are angiosperms.

3. **Examine Each Option**:
- **Cycus**: As a gymnosperm, Cycus lacks vessels and only has tracheids.
- **Mango**: This is an angiosperm and contains vessels in its xylem.
- **Neem**: Also an angiosperm, Neem has vessels in its xylem.
- **Teak**: Similar to Mango and Neem, Teak is an angiosperm and has vessels.

4. **Conclusion**:
- Among the options, only Cycus is the plant where xylem lacks vessels. Therefore, the correct answer is Cycus.

### Final Answer:
Cycus is the plant in which xylem lacks vessels.

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