The fertilization cone that pulls the sperm into the egg is formed from the –

Options

A. Acrosome of sperm
B. Acrosomal process
C. Vitelline layers of the egg
D. Plasma membrane of the egg

Answer

To answer the question "The fertilization cone that pulls the sperm into the egg is formed from the –", we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understand the Concept of the Fertilization Cone
The fertilization cone is a structure that forms during the fertilization process. It plays a crucial role in the mechanism by which the sperm is drawn into the egg.

### Step 2: Evaluate the Options
1. **Acrosome of Sperm**: The acrosome is a cap-like structure on the head of the sperm that contains enzymes necessary for penetrating the egg. However, it does not form the fertilization cone itself.

2. **Acrosomal Process**: This process involves the extension of the sperm's acrosome and the release of enzymes to help penetrate the egg. While it is related to fertilization, it does not directly form the fertilization cone.

3. **Vitaline Layers of Egg**: The vitelline layer is a protective layer surrounding the egg. It provides shape and protection but does not contribute to the formation of the fertilization cone.

4. **Correct Option**: The correct answer is **the fertilization cone is formed from the egg's plasma membrane**. This is not explicitly listed in the options provided, but it is important to note that the fertilization cone is primarily formed from the egg's plasma membrane as it interacts with the sperm.

### Conclusion
The fertilization cone that pulls the sperm into the egg is formed from the egg's plasma membrane, which is not explicitly mentioned in the options provided.