Why are classification systems changing every now and then ?

Discuss how classification systems have undergone several changes over a period of time ?

In five-kingdom classification system, the kingdom that includes, the blue-green algae, nitrogen-fixing bacteria and methanogenic archaebacteria is

Discuss the classification of amines.

Why was the system of classification of elements into triads not found suitable ?

Define classification of element.

The basic unit of classification is

Atomic number is considered to be a more appropriate parameter than atomic mass for classification of elements in a periodic table. Why?

Assertion. Conservative characters are more useful in classification. Reason. These characters do not change during evolution. Therefore, their similarities show relationships among organisms.

The basic unit of classification is?

Explain the classification of matter