During development of embryo in archeogonium of Bryophyta its posterior part form protective embryo cover which is called

Options

A. Paraphysis
B. Calyptra
C. Apophysis
D. Hypophysis.

Answer

### Step-by-Step Text Solution:

1. **Understanding Archegonium**: The archegonium is the female reproductive structure in bryophytes (like mosses and liverworts) where fertilization occurs and the embryo develops.

2. **Embryo Development**: After fertilization, the zygote develops into an embryo within the archegonium. This embryo will eventually grow into the sporophyte generation of the plant.

3. **Protective Cover Formation**: As the embryo develops, its posterior part forms a protective covering. This is crucial for safeguarding the developing embryo from environmental factors.

4. **Identification of the Cover**: The protective cover that forms around the embryo is known as the "Cliptra." It originates from the wall of the archegonium.

5. **Function of Cliptra**: The Cliptra serves as a close protective covering around the embryonic sporophyte, ensuring its safety during the early stages of development.

### Final Answer:
The protective embryo cover formed during the development of the embryo in the archegonium of Bryophyta is called "Cliptra."

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