Choose incorrect option w.r.t. transition after fertilisation in angiosperms

Options

A. Zygote `to` Embryo
B. PEN `to` Endosperm
C. Ovary `to` Fruit
D. Integument `to` Pericarp

Answer

To solve the question "Choose the incorrect option with respect to transition after fertilization in angiosperms," we will analyze each option provided and determine which one does not accurately describe the transitions that occur after fertilization in flowering plants (angiosperms).

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the incorrect option regarding the transitions that occur after fertilization in angiosperms. It's important to focus on what happens to various structures after fertilization.

2. **Analyzing the First Option**:
- **Zygote to Embryo**: After fertilization, the male and female gametes fuse to form a zygote, which then undergoes embryogenesis to develop into an embryo.
- **Conclusion**: This transition is correct.

3. **Analyzing the Second Option**:
- **Primary Endosperm to Endosperm**: After fertilization, one male gamete fuses with the egg to form the zygote, while the other male gamete fuses with two polar nuclei to form the primary endosperm (triploid). This primary endosperm later develops into the endosperm.
- **Conclusion**: This transition is also correct.

4. **Analyzing the Third Option**:
- **Ovary to Fruit**: After fertilization, the ovule develops into a seed, and the ovary develops into a fruit. This is a well-known transition in angiosperms.
- **Conclusion**: This transition is correct.

5. **Analyzing the Fourth Option**:
- **Integument to Pericarp**: The integument is part of the seed coat, while the pericarp refers to the fruit wall. These two structures are distinct and do not transition into one another. The integument does not become the pericarp.
- **Conclusion**: This transition is incorrect.

6. **Final Answer**: The incorrect option regarding the transition after fertilization in angiosperms is **Integument to Pericarp**.

### Summary of the Correct Answer:
The incorrect option is **Integument to Pericarp**.