Sex organs of Anthoceros are

Options

A. Terminal
B. Borne over dorsal surface of thallus
C. Embedded
D. None of these

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks about the location of the sex organs in Anthoceros, which is a genus of hornworts.

2. **Identifying the Options**: The options provided are:
- Option 1: Terminal
- Option 2: Born over dorsal surface of thallus
- Option 3: Embedded
- Option 4: None of these

3. **Defining Anthoceros**: Anthoceros belongs to the family Anthocerotaceae and is represented by approximately 200 species. These species are terrestrial and cosmopolitan in distribution.

4. **Sex Organ Types**: Anthoceros can be either dioecious (having separate male and female individuals) or monoecious (having both male and female organs on the same individual).

5. **Pro-tendrous Nature**: In monoecious species, the male reproductive organs (antheridia) mature before the female reproductive organs (archegonia), which is referred to as being pro-tendrous.

6. **Location of Sex Organs**: The antheridia and archegonia are embedded in the dorsal surface of the thallus. This means they are not located at the ends (terminal) or simply on the surface but are actually integrated into the tissue of the thallus.

7. **Conclusion**: Based on the information, the correct answer is that the sex organs of Anthoceros are embedded in the dorsal surface of the thallus, which corresponds to Option 3.

### Final Answer:
The sex organs of Anthoceros are **embedded**.

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