Spermatophytes in which phloem have albuminous cells and sieve cells

Answer

**Step-by-Step Solution:**

1. **Understanding Spermatophytes**:
- Spermatophytes are a large group of plants that produce seeds. They include two main categories: angiosperms (flowering plants) and gymnosperms (non-flowering seed plants).

2. **Identifying Phloem Components**:
- Phloem is the vascular tissue responsible for the transport of nutrients, particularly sugars, throughout the plant. In angiosperms, the phloem typically contains companion cells and sieve tube elements.

3. **Analyzing Angiosperms**:
- In angiosperms, the phloem does not contain albuminous cells. Instead, it has companion cells that assist in the function of sieve tube elements. Therefore, angiosperms do not fit the criteria mentioned in the question.

4. **Examining Gymnosperms**:
- In gymnosperms, particularly in conifers, the phloem contains albuminous cells. These cells serve a similar function to companion cells in angiosperms and are closely associated with sieve cells (the equivalent of sieve tube elements in gymnosperms).

5. **Conclusion**:
- Based on the analysis, the correct answer to the question is that spermatophytes in which the phloem has albuminous cells and sieve cells are gymnosperms.

**Final Answer**: Gymnosperms.

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