If you use a cladistic approach (organizing taxonomic groups by clades) in grouping organisms together, the resulting classification scheme:

The classification scheme is ancestor.

Explanation:

In cladistic approach is a type of classification in which organisms are classified on the basis of their common ancestor. Those organisms are placed in one group which have common ancestor and share same characteristics or which are evolved from a common ancestor. With the passage of time changes occurs within the body of organisms so these organisms are different from one another in physical structure but have a common ancestor.

enzyme speed up the reactions