Even Though Plant and Animal Development Processes Share a Number

Even though plant and animal development processes share a number of features,there are some differences between the two groups of organisms.Which of the following is NOT a shared characteristic of plant and animal development?

A) Gene expression in developing embryonic tissues is closely regulated.
B) Orientation of cells and tissues is critical for proper development.
C) Differentiation of cells is directed and maintained by cascades of signals.
D) Cell types,once determined,generally cannot change their differentiated characteristics.