Introduction to Reproduction and Development in Animals

“Reproduction is the biological process by which new individual organisms are produced.”

or

“Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction.”

  • Reproduction is one of the most fundamental characteristics of living organisms.
  • Reproduction means the ability to produce individuals of  the same species.
  • 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.

Need of Reproduction

  • Reproduction is critical to the process of species continuation and, as a result, accurately maintains a balance in the environment amongst diverse biotic components.
  • A healthy life would end if it did not reproduce. Reproduction also aids evolution because of the variations that result from the process of reproduction through species intermingling (as observed in sexual reproduction).