Define the following term:
External fertilization

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Fertilization**: Fertilization is the biological process where male and female gametes (sperm and ovum) fuse to form a zygote.

2. **Types of Fertilization**: There are two main types of fertilization: internal fertilization and external fertilization.

3. **Internal Fertilization**: In internal fertilization, the fusion of male and female gametes occurs inside the female's body. An example of this is seen in humans.

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