Endosperm is not seen in the seeds of _________ family.

Options

A. Orchidaceae
B. Cactaceae
C. Ranunculaceae
D. Malvaceae

Answer

To solve the question "Endosperm is not seen in the seeds of _________ family," we will analyze the options provided and determine which family does not produce endosperm in its seeds.

### Step-by-Step Solution:

1. **Understanding Endosperm**:
- Endosperm is a tissue produced in the seeds of flowering plants, which provides nutrition to the developing embryo. It is formed during fertilization and is crucial for seed development in many plant families.

2. **Analyzing the Options**:
- **Orchidaceae**: This is the orchid family. It is known that seeds in this family typically do not have endosperm. Instead, the embryos rely on a symbiotic relationship with fungi (mycorrhizal fungi) for nutrition.
- **Cactaceae**: This is the cactus family. Cacti seeds do contain endosperm, which provides the necessary nutrients for seedling development.
- **Ranunculaceae**: This is the buttercup family. Seeds in this family also contain endosperm, which supports the developing embryo.
- **Malvaceae**: This is the mallow family. Similar to the previous families, seeds in this family also have endosperm.

3. **Identifying the Correct Answer**:
- From the analysis, we find that the only family among the options that does not have endosperm in its seeds is **Orchidaceae**.

4. **Conclusion**:
- Therefore, the answer to the question is **Orchidaceae**.

### Final Answer:
Endosperm is not seen in the seeds of **Orchidaceae** family.