After double fertilization, most zygotes divide only after certain amount of endosperm is formed. One of the importance of this adaptation is

Options

A. To push the developing embryo out of the micropyle
B. To prevent the developing zygote from being divided into many embryos
C. To provide assured nutrition to the developing embryo
D. To provide sufficient space for developing embryo by dissolving outer and inner integuments of ovule

Answer

To solve the question regarding the importance of the adaptation where most zygotes divide only after a certain amount of endosperm is formed, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Double Fertilization**: In angiosperms, double fertilization occurs when one sperm fertilizes the egg cell to form the zygote, while the other sperm fuses with two polar nuclei to form the triploid endosperm.

2. **Role of Endosperm**: The endosperm serves as a nutritive tissue that provides essential nutrients to the developing embryo. It is crucial for the growth and development of the embryo after fertilization.

3. **Timing of Zygote Division**: The adaptation where zygotes divide only after a certain amount of endosperm is formed ensures that the embryo has a sufficient nutrient supply. This timing is critical because the embryo needs energy and resources to grow effectively.

4. **Importance of Nutrition**: If the zygote were to divide too early, the developing embryo might not have adequate nutrition, which could hinder its development and survival. Thus, the formation of endosperm before zygote division is a strategy to ensure that the embryo has the necessary support.

5. **Conclusion**: Therefore, one of the key importance of this adaptation is to provide assured nutrition to the developing embryo, ensuring its successful growth and development.

### Final Answer:
The importance of this adaptation is to provide assured nutrition to the developing embryo.