Evolutionarily, pteridophytes are the first terrestrial plants to possess:

Options

A. Vascular tissues (xylem and phloem)
B. Gametangia
C. Sporangia
D. Multicellular sex organs

Answer

### Step-by-Step Solution:

1. **Understanding Pteridophytes**:
- Pteridophytes are a group of vascular plants that include ferns and their relatives. They are characterized by having a well-defined plant body that is differentiated into roots, stems, and leaves.

2. **Defining Vascular Tissue**:
- Vascular tissue refers to the specialized tissue in plants that is responsible for the transport of water, nutrients, and food. The two main types of vascular tissues are xylem (which transports water and minerals) and phloem (which transports food).

3. **Significance of Vascular Tissues**:
- The presence of vascular tissues is a significant evolutionary advancement because it allows plants to grow taller and survive in terrestrial environments by efficiently transporting resources.

4. **Identifying the Correct Answer**:
- Among the options provided (vascular tissue, gametangia, sporangia, multicellular sex organs), the correct answer is that pteridophytes are the first terrestrial plants to possess vascular tissues. This adaptation enabled them to thrive on land.

5. **Conclusion**:
- Therefore, the statement that "evolutionarily, pteridophytes are the first terrestrial plants to possess vascular tissue" is correct.