Indicate true (T) and false (F) statements below regarding animal development. Your answer would be a four-letter string composed of letters T and F only, e.g. FFFF.
( ) A fertilized egg is totipotent.
( ) Differences in their regulatory DNA can largely explain the differences between animal species.
( ) Inductive signaling is mostly mediated through G-protein-coupled receptors.
( ) A cell's response to a signal depends on its exposure to other signals at that present time as well as in the past.