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Biodiversity

Binomial nomenclature

Biology

Carolus Linnaeus Swedish naturalist and explorer who was the first to frame principles for defining natural genera and species of organisms and to create a uniform system for naming them.

Advantages of scientific names

Following are the advantages of having scientific names:

  • They are accepted by speakers of all languages.

  • Each name applies only to one species, and that each species has only one name.

  • As common names cause many problems to identify the organisms as different regions have different languages for the same thing for example; common name of onion in Urdu is 'Piyaz' but in other regions it is also known as 'ganda' or 'basal' etc but in scientific language it is known as Allium cepa.

This avoids the confusion that often arises from the use of a common name to designate different things in different places or from the existence of several common names for a single species.

Biological names of some common plants and animals

Through a system of nomenclature in which each species of animal, plant or others receives a name of two terms of which the first identifies the genus to which it belongs and the second the species itself or its specific names.

Principles for binomial nomenclature

Some of the rules which are universally adopted for writing scientific name of a species are:

  • Scientific name of any organisms should be italicized when printed, such as Homo sapiens and when handwritten these are underlined.

  • The first word of the name is generic always started with capital letter, while second term is species which is never capitalized.

  • When the scientific name is written first time, it is written full but when it is repeated several times, it is abbreviated. For example; The scientific name of the red rose is Rosa indica, it is abbreviated as R.indica.

  • Sometimes the author name appears after species name which means the species was described by Him. For example; (mango plant) Mangifera indica L. It means Mangifera indica was first described by Linnaeus.