Formation of embryo directly from nucellus and integument is

Options

A. Apospory
B. Adventitive polyembryony
C. Apogamy
D. Apomixis

Answer

To solve the question regarding the formation of an embryo directly from the nucellus and integument, we will analyze the options provided and identify the correct term.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the formation of an embryo directly from the nucellus and integument. We need to identify the correct biological term for this process.

2. **Analyzing the Options**:
- **Option 1: Apospory**: Apospory refers to the development of a gametophyte from the sporophyte without the formation of spores. This is not related to embryo formation from the nucellus and integument. **(Incorrect)**

- **Option 2: Adventitious Polyembryony**: This term refers to the occurrence of more than one embryo in a single seed, specifically through the formation of extra embryos from sporophytic cells (which can be from the nucellus or integuments). This process directly involves the formation of embryos from the nucellus and integument. **(Correct)**

- **Option 3: Apogamy**: Apogamy is the development of a sporophyte from a gametophyte without the fusion of gametes. This does not pertain to the formation of embryos from the nucellus and integument. **(Incorrect)**

- **Option 4: Apomixis**: Apomixis is a form of asexual reproduction where a viable embryo is formed within the seed coat without fertilization. While it involves embryo formation, it does not specifically refer to the direct formation from the nucellus and integument. **(Incorrect)**

3. **Conclusion**: After analyzing all the options, the correct answer is **Adventitious Polyembryony**, as it involves the formation of embryos from the nucellus and integument.

### Final Answer:
The formation of an embryo directly from the nucellus and integument is known as **Adventitious Polyembryony**.