how areas of study - evolution and classification - interlinked

Living organisms are identified and grouped according to their body design in relation to their form and function. Some characteristics are likely toi make more wide-ranging changes in body design than others. There is a roleof time in this as well. So once a certain body design comes into existence, it has an effect on allother succeeding design changes, since it already exists. Thus characteristics that came into existence earlier are more fundamental those which come into existence later. Thus classification of life forms is closely related to their evolution. Most life-forms seen today have arisen by an accumulation of changes in body design that allows the organism possessing them to survive better.

When the idea of evolution is connected to classsification, it can be seen that some organisms with ancient body designs have not changed much whereas other organisms have evolved their particular body designs relatively recently.