Bulk of the seed in caryopsis fruit is formed of

Options

A. Endocarp
B. Scutellum
C. Embryo
D. Endosperm

Answer

To answer the question "Bulk of the seed in caryopsis fruit is formed of," we need to analyze the structure of the caryopsis fruit and identify the components that contribute to the bulk of the seed.

### Step-by-Step Solution:

1. **Understanding Caryopsis**:
- Caryopsis is a type of fruit that is commonly found in grasses, such as wheat, rice, and corn. It is a dry fruit where the seed coat is fused with the pericarp (the fruit wall).

2. **Identifying Seed Components**:
- The caryopsis contains several important structures: the seed coat, the endosperm, the embryo, and the scutellum.
- The seed coat provides protection to the seed.
- The embryo is the part that will develop into a new plant.

3. **Role of Endosperm**:
- The endosperm is a tissue that provides nutrition to the developing embryo. It is formed from the fertilization of the central cell in the ovule and is crucial for seed development.
- In caryopsis, the endosperm is the primary component that contributes to the bulk of the seed.

4. **Scutellum Function**:
- The scutellum is a specialized part of the endosperm that serves to transfer nutrients from the endosperm to the embryo during germination.

5. **Conclusion**:
- Therefore, the bulk of the seed in a caryopsis fruit is formed by the **endosperm**. This is the correct answer as it is the part that contains the majority of the seed's mass and provides nourishment to the embryo.

### Final Answer:
The bulk of the seed in caryopsis fruit is formed of **endosperm**.

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