 abstract objects |  ambiguity |  biology: experiment in |  causation: and manipulability |  developmental biology |  gene |  genetics: ecological |  genetics: molecular |  genetics: population |  heritability |  information: biological |  inheritance systems |  models in science |  pragmatism |  reduction, scientific: in biology |  science: unity of |  scientific knowledge: social dimensions of |  scientific realism |  scientific theories: structure of 