Class 9 | Science | Chapter 7 |Diversity in Living Organisms| NCERT Solutions Page 80 1. Why do we classify organisms? Answer: There are millions of organism or species on earth.It is very difficult to study all of them one by one.The method of arranging organism into groups or sets on the basis of similarities and differences is called classification. Classification … [Read more...] about Chapter 7 Diversity in Living Organisms