Female zebra finches seek mate who sings one song just right

Humans aren't the only living beings who find a singing voice attractive in the opposite sex—songbirds do too. For about a third of the approximately 4,000 songbird species that sing only one song, the features that make ...

Examining the relationship of reproductive health and economics

Access to reproductive health care—and abortion in particular—is an issue that resonates with voters' deeply held personal beliefs and reflects their underlying moral, philosophical, and religious views. But is it also ...

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Reproduction

Reproduction is the biological process by which new individual organisms are produced. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. The known methods of reproduction are broadly grouped into two main types: sexual and asexual.

In asexual reproduction, 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 reproduction. Asexual reproduction is not, however, limited to single-celled organisms. Most plants have the ability to reproduce asexually.

Sexual reproduction requires the involvement of two individuals, typically one of each sex. Normal human reproduction is a common example of sexual reproduction.

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