Which of the following statements is incorrect about post fertilisation events in plants?

Options

A. Ovary grows, enlarges, and ripens to become a fruit
B. Fruit develops, a thick protective wall, called pericarp, around it
C. Zygote divides several times to form an embryo enclosed in the seed
D. Petals of the flower grow and form a part of the fruit after fertilization

Answer

To determine which statement is incorrect about post-fertilization events in plants, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Understand Post-Fertilization Events**: Post-fertilization events refer to the changes that occur in a plant after fertilization has taken place. This includes the development of the ovary into a fruit and the formation of seeds.

2. **Evaluate Statement A**: "The ovary grows, enlarges, and ripens to become a fruit."
- This statement is correct. After fertilization, the ovary indeed develops into a fruit, which can be either dry or fleshy, and it contains the seeds.

3. **Evaluate Statement B**: "Fruit develops a three protective wall called pericarp around it."
- This statement is also correct. The pericarp is the part of the fruit that forms from the wall of the ripened ovary and serves as a protective layer around the seeds.

4. **Evaluate Statement C**: "Zygote divides several times to form an embryo enclosed into the seed."
- This statement is correct as well. The zygote undergoes division to develop into an embryo, which is enclosed within the seed.

5. **Evaluate Statement D**: "Petals of the flower grow and form a part of the fruit after fertilization."
- This statement is incorrect. Petals do not grow or become part of the fruit after fertilization. Instead, they typically wither and fall off after the fertilization process is complete.

6. **Conclusion**: Based on the evaluation of all four statements, the incorrect statement is **D**: "Petals of the flower grow and form a part of the fruit after fertilization."

### Final Answer:
The incorrect statement about post-fertilization events in plants is **D**: "Petals of the flower grow and form a part of the fruit after fertilization."