vertébré (1) temps (durée) (1) organisme (1) mollusque (1) animal (1) in situ (1) évolution (1) embryon (1) dose (1) différenciation (1) conservation (1) adulte (1) Differentiation (1) Development (1) Defects (1) Conservation (1) Activin (1) Transforming growth factors-beta (1) Tissues (1) Time (1) Science (1) Play (1) Ligands (1) Expression (1) Example (1) Evolution (1) Drosophila (1) Defects (1) Pacific oyster (1) Central nervous system (1)