skeleton 퀴즈

The research included an examination of the original fossils and a comparison with skeletons of modern humans and protohumans and also chimpanzees.

The studied species either represent unusual forms that secreted very dense, compact skeletons entirely devoid of large intraskeletal pores (i.e., intertabular and interdissepimental spaces; Microcyclus, Palaeocyclus), or formed particularly thick corallite walls (Calceola), thus minimizing the contribution of intraskeletal cements to the measured isotope ratios.