In non edospermic seed or ex-albuminous seed

Options

A. The endosperm may be completely used up by the developing embryo
B. No endosperm form
C. Endosperm is starchy
D. Endosperm is oily

Answer

**Step-by-Step Solution:**

1. **Definition of Non-Endospermic Seeds:**
Non-endospermic seeds, also known as ex-albuminous seeds, are seeds in which the endosperm is completely consumed by the developing embryo during seed development.

2. **Formation of Seeds:**
Seeds are the final product of sexual reproduction in flowering plants, formed from the fertilization of the ovule. The fertilized ovule develops into a seed.

3. **Types of Seeds:**
There are two main types of seeds based on the presence of endosperm:
- **Albuminous Seeds (Endospermic Seeds):** These seeds retain some endosperm after the embryo has developed.
- **Non-Endospermic Seeds (Ex-albuminous Seeds):** In these seeds, the endosperm is entirely used up by the developing embryo, leaving no residual endosperm.

4. **Characteristics of Non-Endospermic Seeds:**
- The endosperm is completely consumed during the embryo's development.
- Examples of non-endospermic seeds include pea (Pisum sativum) and groundnut (Arachis hypogaea).
- In contrast, albuminous seeds, such as wheat (Triticum aestivum) and maize (Zea mays), retain some endosperm.

5. **Conclusion:**
The key characteristic of non-endospermic seeds is that they do not have residual endosperm because it is fully utilized by the developing embryo.