Question

How classical taxonomy is different from modern taxonomy?

Answer 1

Hint: The classical taxonomy is based on observable morphological characters whereas modern taxonomic studies are based on some essential features like study of both external and internal structure of organisms along with their cell structure, development process and ecological information of organisms.

Complete answer:
Now let us see some differences between classical and modern taxonomy:-

Classical taxonomy	Modern taxonomy
In this type of taxonomy species is considered as a basic unit or can be called a fixed entity.	In this type of taxonomy species is considered and said to be the dynamic entity.
It is known as old taxonomy.	It is known as neo systematics meaning new taxonomy.
Morphological features are taken into the account.	Biological features that are both internal and external features are taken into account.
This taxonomy does not include the evolutionary relationship of organisms.	This taxonomy includes in it the evolutionary relationship of organisms.
The studies are more preferable on the species.	The studies are preferable on the sub-species and the population.
This taxonomy is based on preDarwinian period.	This taxonomy is based on the post-Darwinian period.

Human beings had not only studied different kinds of organisms but also tried to find out relationships among them. This led to the development of a new branch of study in the science field, known as "Systematics". The word systematics is derived from Latin word "Systema" which means systematic arrangement of organisms. It was first used by Carolus Linnaeus in the title of his book published as "Systema Naturae".

Note: Systematics is a wider field of science as with identification, nomenclature and classification, it also takes into account evolutionary relationships between various organisms. "Systematics" is the science which deals with diversity of organisms and all their comparative and evolutionary relationships.