Mode of Reproduction Obvious (IMAGE) Smithsonian Tropical Research Institute Caption Scanning electron microscope photos of these minutely sculptured cupuladriid bryozoan fossils tell paleontologists whether the animal reproduced sexually or clonally. Top: Sexual form-- frontal and basal views Bottom: Clonal form--frontal and basal views Credit Aaron O'Dea Usage Restrictions Credit: Aaron O'Dea License Licensed 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.