Class notes NEET BIOLOGY Simplified NCERT Class XI

1


THE LIVING WORLD
He was also known as
Ernst Mayr (1904 – 2004) BORN ON - 5 july
“THE DARWIN OF THE 20TH
PLACE – Kempten,Germany




DIVERSITY IN THE LIVING WORLD
1.If we increase the area that we make observation in the range and variety of organism that we see will
increase.
2.The number of known species in the world -----1.7-1.8 million
3.The naming of living organism such that particular organism is known by the same name all over the
world is known as NOMENCLATURE.
4.Nomenclature or naming is only possible when the organism is described correctly and we know to
what organism the name is attached to. This process is called IDENTIFICATION.




IMPORTANT FULL FORMS
International Code for Botanical Nomenclature (ICBN).
International code of zoological nomenclature(IUZN).
Binomial nomenclature

This naming system given by Carolus Linnaeus is being practised by biologists all over the world.

 Each name has two components – the Generic name and the specific epithet.
 Let us take the example of mango to understand the way of providing scientific names better. The