realizes has_specified_input has_specified_output role of has role evaluant role assay age determination assay Alan Ruttenberg An assay that determines the duration of part of the life of an organism, where the initial time point is the beginning of some transitional state (such as birth or when planted). OBI group This assay measures time not developmental stage. we recognize that development takes different time periods under different conditions such as media / temperature. For example, age measurement assay of fly age, the output likes 28 days but not mid-life of age at room temperature. age measurement assay age determination assay age measurement datum organism metadata complete