IAmNice2132112 IAmNice2132112 30-11-2020 English contestada What must be true in order for a species to serve as an index fossil? The species must have only lived in a small geographic area. The species must have only lived in a small geographic area. The species must have only lived for a short period of geologic time. The species must have only lived for a short period of geologic time. The species must not be extinct. The species must not be extinct. The species must look similar to several other species. The species must look similar to several other species.
