Two different organisms have anatomically similar structures that are believed to have originated from a common ancestor. the functions are different as a result of environmental circumstances. these anatomically similar structures are a) vestigial. b) mutations. d) homologous. d) tropisms.

Match each term to its scientific definition. a)natural world b)scientific method c)theory 1) everything that can be observed or explained scientifically 2) a well-supported explanation of all the evidence related to a natural phenomenon 3) the procedure of scientific inquiry used to investigate natural phenomena