Cleavage and archegonial polyembroyony is common is

Options

A. Gymnosperms
B. Pteridophytes
C. Angiosperms
D. Bryophytes.

Answer

**Step-by-Step Solution:**

1. **Understanding Polyembryony**:
- Polyembryony refers to the phenomenon where more than one embryo develops from a single fertilized ovule. This can occur in various plant groups.

2. **Types of Polyembryony**:
- There are different types of polyembryony, including cleavage polyembryony and archegonial polyembryony.
- Cleavage polyembryony occurs when a single fertilized egg divides to form multiple embryos.
- Archegonial polyembryony involves the development of multiple archegonia (female reproductive structures) in a gametophyte, leading to the potential for multiple embryos.

3. **Identifying the Correct Group**:
- The question asks which group commonly exhibits both cleavage and archegonial polyembryony.
- Gymnosperms are known for both types of polyembryony. In gymnosperms, a single fertilized egg can give rise to several embryos through cleavage, and multiple archegonia can develop in the female gametophyte, allowing for the fertilization of multiple eggs.

4. **Conclusion**:
- Based on the definitions and characteristics of polyembryony, the correct answer is that cleavage and archegonial polyembryony are common in gymnosperms.

**Final Answer**: Cleavage and archegonial polyembryony is common in **gymnosperms**.

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