Endosperm, a product of double fertilisation in angiosperm is absent in the seeds of

Options

A. coconut
B. Orchids
C. Maize
D. Castor

Explanation

To answer the question regarding the absence of endosperm in the seeds of certain angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Endosperm**:
- Endosperm is a tissue produced during double fertilization in angiosperms. It serves as a source of nourishment for the developing embryo within the seed.

2. **Identifying the Options**:
- The options provided are coconut, orchid, maize, and castor. We need to determine which of these does not have endosperm in its seeds.

3. **Analyzing Each Option**:
- **Coconut**: This is an example of an endospermic seed. The endosperm is present and provides nourishment.
- **Maize**: Maize also has endosperm, which is significant for the nutrition of the developing embryo.
- **Castor**: Castor seeds are endospermic as well, containing endosperm that nourishes the embryo.
- **Orchid**: Orchids are known to have non-endospermic seeds. The endosperm is absent because it is utilized during seed development, and the nourishment for the germinating seed comes from the cotyledons instead.

4. **Conclusion**:
- Based on the analysis, the seed that does not contain endosperm is the orchid. Therefore, the answer to the question is **orchid**.

### Final Answer:
- The endosperm is absent in the seeds of **orchid**.