It has become clear to biologists that they are going to have to find new ways to draw evolutionary trees.

We had a complete evolutionary tree for the horse many years ago.

One way to formulate evolutionary trees is to look at such changes.

Arms and wings, in other words, arise from the same branch of the evolutionary tree.

Darwin drew the first evolutionary tree when he was 28.

Darwin left it to other biologists to figure out what real evolutionary trees looked like.

The only difference as we progress up the evolutionary tree is in the relative ratio between the two.

The idea is to place groups in their correct position on the evolutionary tree.

The evolutionary tree shows the relationships among various biological groups.

Charles Darwin (1809-1882) was the first to produce an evolutionary tree of life.