Which of the following features are true for Pinus

Options

A. Haploid endosperm
B. Bicilliated sperms
C. Double fertilization
D. Presence of antheridia

Explanation

To determine which features are true for Pinus, we will analyze the given options based on the characteristics of Pinus.

### Step-by-Step Solution:

1. **Identify the Plant Group**: Pinus belongs to the group of gymnosperms, specifically the conifers. Understanding its classification helps in identifying its features.

**Hint**: Remember that gymnosperms are seed-producing plants that do not form flowers or fruits.

2. **Understand Siphonogamy**: One of the key features of Pinus is siphonogamy, which refers to the formation of a pollen tube that allows the sperm to reach the ovule. This is a characteristic of many gymnosperms.

**Hint**: Siphonogamy is essential for the fertilization process in plants that do not have water for sperm movement.

3. **Evaluate the Options**:
- **Haploid Endosperm**: In Pinus, the endosperm is haploid and is formed before fertilization. This is a true feature of Pinus.
- **Bisiliated Sperm**: Pinus does not have bisiliated (two-flagellated) sperm; instead, it has non-motile sperm.
- **Double Fertilization**: This process occurs in angiosperms but not in Pinus. Thus, this option is false.
- **Presence of Entradia**: This term is not commonly associated with Pinus; it may refer to structures in other plant types.

4. **Conclusion**: The only feature that is true for Pinus from the given options is the presence of haploid endosperm.

**Final Answer**: The correct answer is **haploid endosperm**.

### Summary of Features:
- **True Feature**: Haploid endosperm (produced before fertilization).
- **False Features**: Bisiliated sperm, double fertilization, presence of entradia.