Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?

Explanation

### Step-by-Step Text Solution:

1. **Introduction to Sexual Reproduction**: Higher organisms often engage in sexual reproduction despite its complexity and energy demands. This raises the question of why they prefer this method over asexual reproduction.

2. **Complexity and Energy Expenditure**: Sexual reproduction is known to be time-consuming and requires a significant expenditure of energy. This complexity includes finding a mate, courtship behaviors, and the actual process of mating.

3. **Genetic Variation**: The primary reason higher organisms resort to sexual reproduction is the introduction of genetic variation among offspring. Sexual reproduction involves the fusion of gametes from two parents, resulting in a zygote that contains a unique combination of DNA.

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