<unk>  is the biological process by which new individual organisms are produced.<unk>  is a fundamental feature of all known life; each individual organism exists as the result of<unk> . The known methods of<unk>  are broadly grouped into two main types: sexual and asexual. Human<unk>  belongs to sexual<unk> .
In asexual<unk> , an individual can reproduce without involvement with another individual of that species. The division of a bacterial cell into two daughter cells is an example of asexual<unk> . Asexual<unk>  is not, however, limited to single-celled organisms. Most plants have the ability to reproduce asexually.
Sexual<unk>  requires the involvement of two individuals, typically one of each sex. Normal human<unk>  is a common example of sexual<unk> .
Reproduction
Fertilization
Spermatogenesis
Oogenesis
Secretion
Fermentation 
Excretion
Extraction 