Some characters / structures are given below. How many of them are found in both bryophyta and pteridophyta?
A. Archegonium
B. Protonema
C. Embryo
D. Ovule
E. Vascular tissue
F. Antheridium

Options

A. Two
B. Three
C. Four
D. Five

Answer

To determine how many characters/structures are found in both Bryophyta and Pteridophyta, we will analyze each structure listed in the question:

1. **Archegonium**:
- Found in both Bryophyta and Pteridophyta. It is the female reproductive structure that produces eggs.

2. **Protonema**:
- Found only in Bryophyta. It is a filamentous stage that develops from the spore and is not present in Pteridophyta.

3. **Embryo**:
- Found in both Bryophyta and Pteridophyta. It develops from the fertilized egg after fertilization.

4. **Ovule**:
- Not found in Bryophyta. Ovules are present in seed plants (Gymnosperms and Angiosperms) but not in Bryophyta or Pteridophyta.

5. **Vascular Tissue**:
- Present only in Pteridophyta. Bryophyta lacks true vascular tissue; they are non-vascular plants.

6. **Antheridium**:
- Found in both Bryophyta and Pteridophyta. It is the male reproductive structure that produces sperm.

Now, let's summarize the findings:

- Structures found in both Bryophyta and Pteridophyta:
- Archegonium
- Embryo
- Antheridium

Thus, the total number of structures found in both groups is **3**.

### Final Answer:
The number of structures found in both Bryophyta and Pteridophyta is **3**.