Sex organ in bryophytes are :-

Options

A. Unicellular and jacketed
B. Unicellular and non-jacketed
C. Multicellular and jacketed
D. Multicellular and non jacketed

Answer

### Step-by-Step Solution:

1. **Identify the Sex Organs in Bryophytes**:
- In bryophytes, the male sex organ is called **antheridium** and the female sex organ is called **archegonium**.

2. **Describe the Structure of Antheridium**:
- The antheridium is typically **globular** in shape.
- It is lined by **sterile cells** on the outer side, which form a protective layer known as the **jacket**.
- Inside the antheridium, there are **fertile cells** known as sperm mother cells that undergo **mitotic division** to produce sperm.

3. **Describe the Structure of Archegonium**:
- The archegonium has a **flask-like shape**.
- Similar to the antheridium, it is also surrounded by a layer of **sterile cells** (the jacket).
- Inside the archegonium, there are **fertile cells** that develop into the egg.

4. **Key Characteristics**:
- Both sex organs are **multicellular** and **jacketed**.
- This jacketed structure is a distinctive feature of bryophytes.

5. **Conclusion**:
- Therefore, the sex organs in bryophytes are the **antheridium** (male) and **archegonium** (female), both of which are multicellular and jacketed.