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

Explanation

Formation of male and female gametes, fusion of gametes/syngamy. Importance - Combination of DNA from two different individuals lead to increase in genetic variation in the organism This leads to diversity in the population which helps in natural selection.
Detailed Answer :
The basic requirements for sexual reproduction to take place are involvement of two parents and fusion of haploid gametes.
Importance of sexual reproduction :
Fusion of gametes results in genetic variations in the offsprings. This promotes diversity of characters in offsprings. These genetic variations, thus, lead to evolution of species as well as allow the organisms to become better adapted in the changing environment.