Siphonogamous fertilization takes place in

Options

A. Bryophytes
B. Selaginella
C. Fern
D. Pinus

Answer

To solve the question "Siphonogamous fertilization takes place in", we will analyze the options provided and understand the concept of siphonogamous fertilization.

### Step-by-Step Solution:

1. **Understanding Siphonogamous Fertilization**:
- Siphonogamous fertilization is a type of fertilization that occurs in certain plants where the male gametes (sperms) are delivered to the egg cell via a pollen tube.
- This process is characteristic of angiosperms (flowering plants) and gymnosperms (non-flowering seed plants).

2. **Analyzing the Options**:
- **Option A: Bryophytes**:
- Bryophytes, which include mosses and liverworts, do not have a pollen tube mechanism for fertilization. Instead, they rely on water for the sperm to swim to the egg. Therefore, this option is incorrect.
- **Option B: Sphagnum (Sileginella)**:
- Sileginella is a type of lycophyte and also does not exhibit siphonogamous fertilization. This option is also incorrect.
- **Option C: Ferns**:
- Ferns are classified as pteridophytes and also do not utilize a pollen tube for fertilization. They require water for sperm motility. Thus, this option is incorrect as well.
- **Option D: Pinus**:
- Pinus is a genus of gymnosperms. Gymnosperms utilize siphonogamous fertilization, where the pollen tube carries the male gametes to the egg cell. Therefore, this option is correct.

3. **Conclusion**:
- Based on the analysis, the correct answer to the question is **Pinus**, as it is the only option where siphonogamous fertilization occurs.

### Final Answer:
Siphonogamous fertilization takes place in **Pinus**.