Define fertilisation. Give significance of fertilisation

Explanation

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

1. **Definition of Fertilization:**
Fertilization is defined as the biological process in which a male gamete (sperm) fuses with a female gamete (egg or ovum) to form a zygote. This process is essential for sexual reproduction and marks the beginning of the development of a new organism.

2. **Process of Fertilization:**
- The male gamete (sperm) is introduced to the female gamete (egg).
- Upon successful fusion, the genetic material from both gametes combines.
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