Final answer:
Scientists study the evolutionary relationships of multiple enzyme forms by using morphologic and genetic evidence, such as homologous structures. These structures indicate common evolutionary paths and can help reconstruct evolutionary histories.
Step-by-step explanation:
To study the evolutionary relationships of multiple enzyme forms found in sets of related species, scientists use morphologic and genetic evidence. They look for similarities in physical features and genetic sequences, which are referred to as homologous structures. These structures indicate common evolutionary paths and can be used to reconstruct evolutionary histories. For example, the bones in bat and bird wings have homologous structures. Scientists also use cladistics, which organizes homologous information to determine an evolutionary timeline.