Photo 1 (IMAGE) Florida Museum of Natural History Caption Organisms with hard, durable parts, like shells, are more likely to be preserved as fossils than organisms composed entirely of soft tissue. Credit Carrie Tyler Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.