In tenuinucellate type of ovule

Options

A. nucellus is small
B. nucellus is large
C. nucellus does not develop
D. ovule is vestigeal

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the characteristics of a tenuinucellate type of ovule. We need to determine the nature of the nucellus in this type of ovule.

2. **Definition of Nucellus**: The nucellus is the central part of the ovule. It is crucial because it is from this structure that the embryo sac develops.

3. **Types of Nucellus**: Nucellus can be categorized based on its size:
- **Crassinucelate**: This type has a massive or thick nucellus.
- **Tenuinucellate**: This type has a thin or small nucellus.

4. **Characteristics of Tenuinucellate Ovule**: In a tenuinucellate ovule, the nucellus is characterized as being thin or small. This is the defining feature of this type of ovule.

5. **Conclusion**: Based on the understanding that the tenuinucellate type of ovule has a small or thin nucellus, the correct answer to the question is that the nucellus is small.

### Final Answer:
The nucellus in a tenuinucellate type of ovule is small.