Nucellus embryo is

Options

A. amphimictic haploid
B. amphimictic diploid
C. apomictic haploid
D. apomictic diploid

Explanation

To answer the question "Nucellus embryo is," we need to understand the concepts related to the formation of embryos in flowering plants, particularly in the context of the nucellus.

### Step-by-Step Solution:

1. **Understanding Nucellus**:
- The nucellus is a part of the ovule in seed plants. It is the tissue that surrounds the developing embryo sac and is involved in the nourishment of the developing embryo.

2. **Embryo Formation**:
- In flowering plants, the embryo develops from the fertilized egg cell within the embryo sac. The process of embryo formation is a crucial part of sexual reproduction.

3. **Types of Embryos**:
- The term "epimictic" refers to a type of embryo formation that occurs in certain plants. It is important to differentiate between haploid and diploid stages in plant reproduction.
- A haploid (n) cell contains one set of chromosomes, while a diploid (2n) cell contains two sets of chromosomes.

4. **Nucellus and Embryo**:
- The embryo that develops from the nucellus is typically haploid because it arises from the gametes (egg and sperm) that are haploid in nature.

5. **Conclusion**:
- Therefore, the correct classification of the nucellus embryo is "epimictic haploid." This means that the embryo formed from the nucellus during the process of sexual reproduction is haploid.

### Final Answer:
The correct answer is **epimictic haploid**.

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