Phloem in gymnosperms lacks :

Options

A. Albuminous cells and sieve cells
B. Sieve tubes only
C. Companion cells only
D. Both sieve tubes and companion cells

Answer

To answer the question "Phloem in gymnosperms lacks:", we will analyze the components of phloem in gymnosperms and compare them to those in angiosperms.

### Step-by-Step Solution:

1. **Understand the Components of Phloem**:
Phloem is primarily responsible for the transport of nutrients and food (mainly sugars) in plants. In angiosperms (flowering plants), phloem consists of sieve tubes, companion cells, phloem fibers, and phloem parenchyma.

**Hint**: Recall the main components of phloem in flowering plants.

2. **Identify Phloem Components in Gymnosperms**:
In gymnosperms, the phloem is different. It lacks sieve tubes and companion cells. Instead, gymnosperms have sieve cells and albuminous cells. Sieve cells are elongated cells that facilitate the transport of nutrients, while albuminous cells serve a supportive role similar to companion cells.

**Hint**: Focus on the differences in phloem structure between gymnosperms and angiosperms.

3. **Determine What is Lacking**:
Since gymnosperms do not have sieve tubes or companion cells, we conclude that both of these components are absent in their phloem.

**Hint**: Think about what specific components are mentioned in the question.

4. **Select the Correct Answer**:
The options given are:
- Albuminous cells and sieve cells
- Sieve tubes only
- Companion cells only
- Both sieve tubes and companion cells

Based on our analysis, the correct answer is "both sieve tubes and companion cells."

**Hint**: Review the options carefully to ensure you select the one that matches your findings.

### Final Answer:
Phloem in gymnosperms lacks both sieve tubes and companion cells.