Clawed frog - froglet (IMAGE) McMaster University Caption The African clawed frog is used as a model organism for biological research because of its close evolutionary relationship to humans. Credit Adam Bewick Usage Restrictions None. License Original content 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.