Which of the following is correct about the post-fertilization events in flowering plants?

Options

A. Development of embryo before endosperm.
B. Endosperm develops before embryo
C. Both the development of embryo and endosperm occurs simultaneously
D. All are correct

Answer

To solve the question regarding the post-fertilization events in flowering plants, we need to analyze the options provided and understand the sequence of development that occurs after fertilization.

### Step-by-Step Solution:

1. **Understanding Post-Fertilization Events**:
- Post-fertilization events refer to the processes that occur after the fertilization of the ovule, which includes the development of the embryo and the endosperm.

2. **Examining the Options**:
- **Option 1**: Development of embryo before endosperm.
- **Option 2**: Endosperm develops before embryo.
- **Option 3**: Both the development of embryo and endosperm occur simultaneously.
- **Option 4**: All are correct.

3. **Analyzing the Development Sequence**:
- In flowering plants, the endosperm is formed shortly after fertilization. It is crucial because it provides the necessary nutrients to the developing embryo.
- The endosperm develops first to ensure that the embryo has a food source during its development.

4. **Conclusion**:
- Based on the understanding that the endosperm develops before the embryo to provide nourishment, the correct answer is **Option 2: Endosperm develops before embryo**.

### Final Answer:
The correct statement about the post-fertilization events in flowering plants is **Option 2: Endosperm develops before embryo**.