一个处于发育最初阶段的蝌蚪(stage 59 热带爪蟾,图左)以及完成变化的一只幼蛙(stage 66 热带爪蟾,图右) (IMAGE) Proceedings of the National Academy of Sciences Caption 一个处于发育最初阶段的蝌蚪(stage 59 热带爪蟾,图左)以及完成变化的一只幼蛙(stage 66 热带爪蟾,图右)。在发育的过程中,骨架经历了巨大的重组和变化,尾杆骨于这个期间形成。 Credit Image Courtesy of Gayani Senevirathne Usage Restrictions None 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.