Antheridium in ferns is

Options

A. multicellular and jacekted
B. stalked, hemispherical and borne ventrally in posterior part between rhizoids
C. its jacket hasd 32-48 cells
D. all of the above.

Answer

To answer the question "Antheridium in ferns is?", we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understanding Antheridium
- Antheridium is the male reproductive structure in ferns and other pteridophytes. It is responsible for producing sperm.

### Step 2: Characteristics of Antheridium
- Antheridia in ferns are multicellular, meaning they are composed of multiple cells.
- They are also jacketed, which means they are surrounded by a protective layer of cells.

### Step 3: Evaluating the Options
- **Option A**: Multicellular and jacketed.
- This is true, as antheridia are indeed multicellular and have a protective jacket.

- **Option B**: Stocked, hemispherical, and born ventrally in the posterior part between rhizoids.
- This description is also accurate for the structure and position of antheridia in ferns.

- **Option C**: Its jacket has 32-48 cells.
- This is a specific detail about the number of cells in the jacket, which is generally true for many ferns.

- **Option D**: All of the above.
- Since options A, B, and C are all correct, this option must also be correct.

### Step 4: Conclusion
- Since all the characteristics mentioned in options A, B, and C are true, the correct answer is **Option D: all of the above**.

### Final Answer
**The correct answer is Option D: all of the above.**

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