The phenomenon observed in some plants where in parts of the sexual apparatus is used for forming embryos without fertilisation is called

Options

A. parthenocarpy
B. apomixis
C. vegetative propagation
D. sexual reporduction

Explanation

To answer the question regarding the phenomenon observed in some plants where parts of the sexual apparatus are used for forming embryos without fertilization, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a specific phenomenon in plants where embryos are formed without the process of fertilization.

2. **Identifying Key Terms**: The key terms in the question are "embryos," "without fertilization," and "sexual apparatus." This indicates that we are looking for a form of reproduction that does not involve the fusion of male and female gametes.

3. **Analyzing the Options**:
- **Parthenocarpy**: This refers to the development of fruit without fertilization. However, it does not involve the formation of embryos, as it pertains to fruit development without seeds.
- **Apomixis**: This is the process where seeds are formed without fertilization. In apomixis, the female gametophyte (megaspore) develops directly into an embryo without undergoing meiosis or fertilization. This matches the criteria of forming embryos without fertilization.
- **Vegetative Propagation**: This is a method of asexual reproduction where new plants grow from parts of the parent plant (like stems, roots, or leaves). It does not involve the sexual apparatus or the formation of embryos in the context of fertilization.
- **Sexual Reproduction**: This involves the fusion of male and female gametes, which is contrary to the question's requirement of no fertilization.

4. **Conclusion**: Based on the analysis, the correct answer is **Apomixis**, as it is the only option that describes the formation of embryos without fertilization.

### Final Answer:
The phenomenon observed in some plants where parts of the sexual apparatus are used for forming embryos without fertilization is called **Apomixis**.

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