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 adaptation of zygote division after endosperm formation, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Double Fertilization**:
- In flowering plants, double fertilization occurs when one male gamete fuses with the egg cell to form a zygote, while the other male gamete fuses with two polar nuclei to form triploid endosperm.

2. **Formation of Endosperm**:
- The endosperm is crucial as it serves as a nutritive tissue that supports the developing embryo. It is formed shortly after fertilization.

3. **Timing of Zygote Division**:
- Most zygotes do not immediately divide after fertilization. Instead, they wait until a certain amount of endosperm has developed. This is an adaptation that ensures the embryo has adequate nutrition.

4. **Importance of Endosperm**:
- The primary role of the endosperm is to provide nourishment to the embryo as it develops. If the zygote were to divide before sufficient endosperm is formed, the embryo might not receive the necessary nutrients for growth.

5. **Conclusion**:
- Therefore, the adaptation of delaying zygote division until after endosperm formation is important for ensuring that the developing embryo has assured nutrition.

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