Class Notes On Diversity In The Living World
Diversity in the living world:
-Described number of species range 1.7-1.8 million.
-Local names of organisms may not be applied at global level.
-Scientific names are given to organisms after identification, acceptable at global level.
-Nomenclature is done as per criteria given in ICBN (International code for botanical nomenclature)&
ICZN (International code for zoological nomenclature)
-Binomial nomenclature was given by CAROLUS LINNAEUS.
- First word is Generic name & second word is Specific epithet in scientific name of organism.
-Names are in Latin or Latinised word.
-Names, if hand written are separately underlined & if printed, areitalicised.
-First word starts with capital letter & second word with small letter.
Example: Mangiferaindica (Mango)
-Name of author in last as abbreviation.
-For ease of study organisms are classified into groups or categories known as taxa.
- eg. Taxon may be Dogs, Mammals, wheat, Rice etc.
-Process of classification into different taxa is called taxonomy.
-Identification, classification, nomenclature are basic to taxonomy.
-Systematics studies evolutionary relationship between organisms.