Which one is common between Pinus and Dryopteris

Options

A. Presence of antheridia and archegonia
B. Presence of pollen tube
C. Absence of seeds
D. Absence of fruits.

Answer

### Step-by-Step Solution

1. **Identify the Groups**: Pinus belongs to the group Gymnosperms, while Dryopteris belongs to the group Pteridophytes. Understanding the classification of these plants is crucial for identifying common features.

2. **Characteristics of Gymnosperms**: Gymnosperms, like Pinus, are characterized by having naked seeds and do not produce fruits. They reproduce through pollination and have structures such as pollen tubes.

3. **Characteristics of Pteridophytes**: Pteridophytes, such as Dryopteris, are seedless plants that reproduce via spores. They do not have flowers or seeds and are characterized by the presence of vascular tissues.

4. **Evaluate the Options**: The question provides several options to identify the common feature between Pinus and Dryopteris:
- **Option 1**: Presence of Antheridia and Archegonia - Incorrect, as these structures are primarily found in Bryophytes and Pteridophytes.
- **Option 2**: Presence of Pollen Tube - Incorrect, as pollen tubes are specific to Gymnosperms and not found in Pteridophytes.
- **Option 3**: Absence of Seeds - Incorrect, since Gymnosperms have naked seeds while Pteridophytes are seedless.
- **Option 4**: Absence of Fruit - Correct, as both groups do not produce fruits. Gymnosperms do not form fruits due to the absence of ovaries, and Pteridophytes do not produce fruits at all.

5. **Conclusion**: The common feature between Pinus and Dryopteris is the absence of fruit. Therefore, the correct answer is Option 4.