What is unique about archaea quizlet? Archaea are organisms that have many unique molecular traits. Archaea are prokaryotes, but their cell walls are chemically different from those of bacteria. Some olecules in archaea are similar to molecules in eukaryotes. Some molecules in archaea are not foun...
Since disconformities are hard to recognize in a layered sedimentary rock sequence, they are often discoveredwhen the fossils in the upper and lower rock units are studied. A gap in the fossil record indicates a gap in the depositional record, and the length of time the disconformity represen...