Persistent nucellus in the seed is observed in

Options

A. Castor and Beet
B. Black pepper and Beet
C. Black pepper and Maize
D. All of these

Answer

To solve the question "Persistent nucellus in the seed is observed in," we need to understand what a persistent nucellus is and identify the correct options provided.

### Step-by-Step Solution:

1. **Understanding Nucellus**:
- The nucellus is the central part of the ovule in seed plants, which contains the embryo sac. It usually gets consumed during the development of the seed.

**Hint**: Remember that the nucellus is typically involved in the formation of the embryo sac.

2. **Definition of Persistent Nucellus**:
- A persistent nucellus refers to a condition where the nucellus remains present in the seed after fertilization, instead of being completely consumed. This can provide additional nutrition to the developing seed.

**Hint**: Think about how the nucellus can provide nutrients even after fertilization.

3. **Identifying Examples**:
- We need to identify which of the given options contain seeds with a persistent nucellus:
- **Option 1**: Castor and beet
- **Option 2**: Black pepper and beet
- **Option 3**: Black pepper and maize
- **Option 4**: All of these

4. **Analyzing Each Option**:
- **Castor and Beet**: Both of these plants have seeds where the nucellus persists.
- **Black Pepper and Beet**: Black pepper also has a persistent nucellus.
- **Black Pepper and Maize**: Black pepper has a persistent nucellus, but maize does not.
- **All of These**: This option would only be correct if all previous options were correct.

**Hint**: Look closely at each plant's seed structure to determine if the nucellus persists.

5. **Conclusion**:
- The correct answer is **Option 2: Black pepper and beet**, as both of these have a persistent nucellus.

### Final Answer:
**The persistent nucellus in the seed is observed in black pepper and beet.**