because they _____.? Differential gene expression and apoptosis are key processes in development because they _____.
a)have provided theories as to how cells specialize and proliferate
b)offer an explanation as to how transcription controls development and how loss of specific cells can facilitate formation of mature organs
c)provide a plausible explanation as to how controlled DNA replication controls cell death in a regulated fashion
d)have provided hypotheses on mechanisms in which gene activation controls cell death and apoptosis promotes cell division