State the basic requirement for sexual reproduction ? Write the importance of such reproduction in nature.

Explanation

### Step-by-Step Text Solution

**1. Definition of Sexual Reproduction:**
- Sexual reproduction is the biological process where male and female gametes fuse to form a zygote. The male gamete (sperm) is produced by the male organism, while the female gamete (ovum) is produced by the female organism.

**2. Basic Requirements for Sexual Reproduction:**
- The primary requirement for sexual reproduction is the presence of male and female gametes.
- Male gametes (sperm) are produced in the male reproductive system, while female gametes (ovum) are produced in the female reproductive system.
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