Fertilizin is a chemical substance produced from

Answer

**Step-by-Step Solution:**

1. **Understanding Fertilizin**: Begin by identifying what fertilizin is. Fertilizin is a chemical substance that plays a crucial role in the fertilization process.

2. **Identifying the Source**: Recognize that fertilizin is produced by a specific part of the reproductive system. In this case, it is produced by the outermost layer of the egg.

3. **Composition of Fertilizin**: Note that fertilizin is a type of protein, specifically classified as a glycoprotein or mucopolysaccharide. This composition is important because it helps in the biological functions of fertilizin.

4. **Function of Fertilizin**: Understand the role of fertilizin in reproduction. It aids in the attraction of sperm to the egg, facilitating the process of fertilization.

5. **Final Answer**: Conclude that fertilizin is produced by the outer layer of the egg or ovum.

**Final Answer**: Fertilizin is a chemical substance produced by the outer layer of the egg (ovum).

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