Classification systems

Artificial classification is based on one or a few easily observable characteristics and usually designed for practical purpose with an emphasis on convenience and simplicity.

Natural system of classification tries to use natural relationships between organisms.

1. It is easy to classify organisms since it is based on few observable characteristics.
2. It does not take much time to classify organisms based on this system (not time consuming).
3. It does not need expertise (even a layman can do).
4. It is relatively stable i.e. not easily changing from time to time.

1. It tends to place closely related organisms into different groups instead of being grouped together e.g. a bat can be placed in a group of birds instead of mammals.
2. Different or unrelated organisms may be placed in the same group e.g. bats placed in a group of birds, worms placed with snakes in the same group.
3. The system does not provide enough information about its members.
4. It is difficult to incorporate additional information.

1. Closely related organisms are placed in the same group.
2. It reflects evolutionary relationships.
3. Unrelated organisms cannot be placed in the same group.
4. It makes it easy to incorporate additional information.

1. It is difficult since it considers many features.
2. It requires expertise i.e. more knowledge about an organism.
3. It is time consuming.
4. It is relatively unstable i.e. it changes from time to time.
5. It is more expensive since more data are required.