Which of the Following Distinguishes the Developmental Cascade Seen in Drosophila

Multiple Choice

Which of the following distinguishes the developmental cascade seen in Drosophila melanogaster from a signal transduction cascade?

A) Transcription factors are involved only in the signal transduction cascade.
B) Transcription factors are involved only in the developmental cascade.
C) The signal transduction cascade occurs mainly within a single cell.
D) The signal transduction cascade takes place over a much longer period of time.
E) Protein kinases are found only in the signal transduction cascade.