Chlamydomonas (image) Max-Planck-Gesellschaft Caption The green alga is a microscopic breaststroke swimmer. The movements of its two flagella are synchronised by mechanical forces: its swimming strokes slow down or accelerate, depending on how the cell rocks while swimming. Credit MPI-CBG, Dresden Usage Restrictions None 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.